Errors In Older Adults Research Articles

Prevalence and risk factors for refractive error in older adults in eight ethnicities in China: The China national health survey

PurposeThis study aimed to investigate the prevalence of refractive error (RE) and risk factors for myopia among older adults in the Han and various minority ethnic groups across seven provinces in China. MethodsThis cross-sectional study forms a part of the ophthalmic dataset of the China National Health Survey (CNHS). Face-to-face interviews and ophthalmic examinations were conducted in seven provinces located in western and northern China. The age- and sex-adjusted prevalence of RE among Han and seven other ethnic groups aged 50–80 years were compared. A mixed-effects model was used to identify the risk factors associated with RE. ResultsA total of 12,902 participants, including 8800 Han and 4102 from ethnic minorities, were included in the study. The age- and sex-adjusted prevalence of myopia, high myopia, hyperopia, and astigmatism ranged from 15.3 % (Manchu) to 22.9 % (Han), 0.2 % (Yugur) to 2.8 % (Han), 21.6 % (Tibetan) to 48.9 % (Uyghur), and 38.7 % (Yi) to 57.5 % (Manchu) across different ethnicities, respectively. Compared to the Han population, the Mongolian (odds ratios (OR) 0.62, 95 % confidence interval (CI) 0.46–0.84, p = 0.002), Tibetan (OR 0.66, 95 % CI 0.52–0.85, p = 0.001), Uyghur (OR 0.63, 95 % CI 0.49–0.80, p < 0.001), Yi (OR 0.65, 95 % CI 0.46–0.92, p = 0.014), and Yugur (OR 0.65, 95 % CI 0.50–0.85, p = 0.001) ethnicities were less likely to have myopia. There was no significant difference in the prevalence of myopia between the Manchu, Korean, and Han ethnic groups. Factors associated with a lower prevalence of myopia included rural residence (p < 0.001), a body mass index (BMI) > 18.5 kg/m2 (all p < 0.001), residence in higher latitude areas (p = 0.020), and a history of smoking (p = 0.002 in the past smoking group, p = 0.031 in the current smoking group). The Mongolian (p = 0.006) and Yugur (p = 0.007) populations, participants living in rural areas (p = 0.012), and those with a BMI >24 kg/m2 (p = 0.038 in the >24.0 ≤ 27.0 kg/m2 group or p = 0.041 in the >27.0 kg/m2 group) were less likely to have high myopia. Factors associated with a higher prevalence of hyperopia included older age (all p < 0.001), rural residence (p = 0.039), higher latitude areas (p = 0.031), smoking history (p = 0.040), and Mongolian (p = 0.001), Uyghur (p < 0.001), Yi (p < 0.001), and Yugur (p = 0.002) ethnicities. Conversely, the Manchu population (p = 0.004) and individuals with higher education levels than illiteracy (p = 0.024 or p < 0.001) were less likely to have hyperopia. ConclusionsMyopia affected more than one-fifth of the older adults in the Han population in this survey. Significant differences in the prevalence of RE were observed between minority ethnicities and Han individuals, except for the Manchu and Korean groups.

Syntactic Errors in Older Adults with Depression.

Background and Objectives: This study investigated the differences in syntactic errors in older individuals with and without major depressive disorder and cognitive function disparities between groups. We also explored the correlation between syntax scores and depression severity. Materials and Methods: Forty-four participants, assessed for dementia with the Mini-Cog, completed the 15-item Geriatric Depression Scale (TGDS-15) and specific language tests. Following a single-anonymized procedure, clinical psychologists rated the tests and syntax scores. Results: The results showed that the depressive disorders group had lower syntax scores than the non-depressed group, primarily on specific subtests. Additionally, cognitive test scores were generally lower among the depressed group. A significant relationship between depression severity and syntax scores was observed (r = -0.426, 95% CI = -0.639, -0.143). Conclusions: In conclusion, major depressive disorder is associated with reduced syntactic abilities, particularly in specific tests. However, the relatively modest sample size limited the sensitivity of this association. This study also considered the potential influence of cultural factors. Unique linguistic characteristics in the study's context were also addressed and considered as potential contributors to the observed findings.

330 Evaluating anticoagulant prescribing errors in older adults in a rehabilitation setting

Abstract Background Anticoagulant use is common in older adults for the prevention or treatment of a number of conditions, most commonly Venous Thrombo-Embolism (VTE) or to prevent stroke in atrial fibrillation. Our audit aimed to review anticoagulation prescribing practices, identify errors and areas for improvement. Methods The initial retrospective audit of all inpatients in a medical gerontology ward took place from 15/11/2022–30/12/22. Data collected included age, sex, weight, renal profile, anticoagulation type, dose and indication. Information was collected from medication records, clinical notes and online laboratory system. After initial audit, multiple education sessions were conducted with the medical team. Re-audit of all inpatients occurred from 05/04/2023–25/04/2023. The guidelines used were the HSE Prescribing Tips for Anticoagulation and local Hospital Guidelines on VTE prophylaxis. Results The initial audit of 73 patients showed 15% (11) rate of prescribing error with 7 subtherapeutic and 4 supratherapeutic doses. Of these 11 errors, 4 doses were corrected recently prior to audit. Average age was 82.6 (64–100) and 55% (40) were female. The re-audit of 51 patients showed the rate of error improved to 7.84%(4) with 4 supratherapeutic doses. 1 dose was corrected on admission and 5.88%(3) required dose adjustment due to fluctuations in weight and renal function throughout admission. Average age was 83.1(66–103) and 69%(35) were female. Conclusion The re-audit demonstrated ongoing education sessions reduces prescribing error with a 48% reduction. However ongoing monitoring throughout admission is required to account for fluctuations in weight and renal function. Suggestions for further improvements include ongoing regular education sessions with the medical team. Further sessions are planned with the wider multidisciplinary team members to highlight importance of regularly monitoring weight and renal function and medication dosages. This audit also reinforces the importance of the role of pharmacist in the multidisciplinary team in Rehabilitation Units and would support regular pharmacist input on an regular basis.

Tools to reduce prescribing errors of psychotropic drugs in older adults

Inappropriate prescribing is a major problem in psychiatric care in older adults. Factors such as the high proportion of older people with a high prevalence of mental disorders, the physiological changes typical of aging, multimorbidity, polypharmacy, the lack of evidence in treatment guidelines for this population, the degree of professional ignorance; give rise to the propensity to make prescription errors of various kinds. To review and summarize the available prescription tools that can provide support to improve prescription practices in psychopharmacology of the elderly. Method: A bibliographic review of the tools to reduce prescription errors in older adults was carried out: pharmacological reconciliation, interaction check, prevention, detection and reversal of prescription cascades and tools with explicit and implicit criteria (MAI, Beers, STOPP/START, FORTA, IFAsPIAM). A clipping was made that groups the recommendations in the field of psychopharmacology. As there are no specific tools to improve practices in geriatric psychopharmacology, a compendium of its recommendations can be of orientation to the psychiatrist of older adults.

Medication Errors Among Hospitalized Adults in Medical Wards of Nekemte Specialized Hospital, West Ethiopia: A Prospective Observational Study.

PurposeA high prevalence of medication errors in older adults are due to a combination of different factors such as polypharmacy, polymorbidity, enrolment in several disease-management programs, and fragmentation of care that causes medication errors in all age groups. This study aims to assess the incidence and determinants of medication errors among hospitalized adults in medical wards of Nekemte Specialized Hospital (NSH), West Ethiopia.Patients and MethodsA prospective observational study design was conducted at Nekemte Specialized Hospital among hospitalized adults from October 30, 2018 to January 30, 2019. Data were collected by using checklist-guided observation and review of medication order sheets, medication administration records, and patient charts. To identify the independent predictors of medication errors, logistic regression analysis was used. Statistical significance was considered at a p-value <0.05.ResultsA total of 351 patients were included in the present study. The mean age of the patients was 40.67+15.78 years. A total of 813 medication errors were recorded. The most common stage for medication errors was physician ordering 263 (32.4%). In the multivariable analysis, age ≥65 years (AOR: 2.54, 95%CI: 1.12–5.75, p=0.025), hospital stay ≥7 days (AOR: 2.16, 95%CI: 1.17–3.98, p=0.014), number of medication taken (AOR: 1.75, 95%CI: 1.13–2.73, p=0.013) and presence of comorbidity (AOR: 1.57, 95%CI: 1.01–2.46, p=0.049) had shown statistical significance in predicting medication errors.ConclusionMedication errors are common at Nekemte Specialized Hospital with an incidence of 48.3 per 100 orders, 231.6 per 100 admissions, and 433.4 per 1000 patient days. In particular, adults with older age, increased hospital stay, a greater number of medications, and presence of comorbidities were at greater risk for medication errors.

Neural regions associated with gain-loss frequency and average reward in older and younger adults

Research on the biological basis of reinforcement-learning has focused on how brain regions track expected value based on average reward. However, recent work suggests that humans are more attuned to reward frequency. Furthermore, older adults are less likely to use expected values to guide choice than younger adults. This raises the question of whether brain regions assumed to be sensitive to average reward, like the medial and lateral PFC, also track reward frequency, and whether there are age-based differences. Older (60-81 years) and younger (18-30 years) adults performed the Soochow Gambling task, which separates reward frequency from average reward, while undergoing fMRI. Overall, participants preferred options that provided negative net payoffs, but frequent gains. Older adults improved less over time, were more reactive to recent negative outcomes, and showed greater frequency-related activation in several regions, including DLPFC. We also found broader recruitment of prefrontal and parietal regions associated with frequency value and reward prediction errors in older adults, which may indicate compensation. The results suggest greater reliance on average reward for younger adults than older adults.

Subjective Verticality Is Disrupted by Astigmatic Visual Distortion in Older People.

PurposeThere is little research evidence to explain why older adults have more problems adapting to new spectacles incorporating astigmatic changes than younger adults. We tested the hypothesis that astigmatic lenses oriented obliquely would lead to errors in verticality perception that are greater for older than younger adults.MethodsParticipants included 12 young (mean ± SD age 25.1 ± 5.0 years) and 12 older (70.2 ± 6.3 years) adults with normal vision. Verticality perception was assessed using a computer-based subjective visual vertical (SVV) task, under static and dynamic (in the presence of a moving peripheral distractor) conditions and when viewing targets through the near refractive correction (control condition), and two forms of astigmatic lenses oriented in the vertical, horizontal, and oblique meridians.ResultsThe older group demonstrated much greater dynamic SVV errors (e.g., 3.4° for the control condition) than the younger group (1.2°, P = 0.002), larger errors with vertical and horizontal astigmatic lenses (older group 4.1°and 5.2° for toric and magnifier lenses vs. younger group 1.2° and 1.4°, respectively, P < 0.001), and a larger influence of the oblique astigmatic lenses (older group 5.6° vs. younger group 2.1°, P<0.001).ConclusionsAstigmatic lenses produced little or no errors in SVV in young adults, but large static and dynamic SVV errors in older adults. This indicates a greater reliance on visual input with increased age for SVV, and helps explain why oblique astigmatic refractive corrections can cause dizziness in older patients and why they report greater difficulties adapting to new spectacles with astigmatic changes.

Effects of a Brief, Online, Focused Attention Mindfulness Training on Cognition in Older Adults: a Randomized Controlled Trial

Many cognitive changes occur in later life, including declines in attentional control and executive functioning. These cognitive domains appear to be enhanced with mindfulness training, particularly focused attention mindfulness (FAM) meditation, suggesting this practice might slow age-related change. We hypothesized that FAM training would increase self-reported and behaviorally measured mindfulness; improve executive functioning, attentional control, and emotion regulation; and reduce self-reported daily cognitive errors in older adults. To address the call for higher methodological rigor in the field, we used a RCT design with an active control group, measured credibility and expectancy, used objective measures, and attempted to isolate mechanisms of action of mindfulness. Fifty older adults aged 65 to 90 (M = 75.7, SD = 5.7) completed pre-training testing followed by 6 weeks of online daily FAM or mind-wandering (control) training and then returned for post-training testing. Conditions were comparable with respect to credibility and expectancy. However, most hypotheses were not supported. Though aspects of mindfulness, Fs(1,45) ≥ 7.42, ps ≤ .009, ηp2s ≥ 0.13, CIs90% = [0.02, 0.37] and inhibitory control, F(1,43) = 4.95, p = .031, ηp2 = 0.10, CI90% = [0.01, 0.25], increased, this was not specific to mindfulness training. There was modest evidence of an improvement in attentional control specific to the mindfulness group, F(1,43) = 4.59, p = .038, ηp2 = 0.10, CI90% = [0.01, 0.24], but this was not consistent across our two measures. Results are encouraging for the continued study of mindfulness for improving aspects of attentional control in older adults. However, the present research requires replication in a larger, more diverse sample. Implications for future mindfulness studies with older adults are discussed.

Memory errors in older adults: Analysis from false memory and metamemory, and the relationship with mental health

Memory errors in older adults: Analysis from false memory and metamemory, and the relationship with mental health

The Association between Frailty and Uncorrected Refractive Error in Older Adults

ABSTRACTPurpose: Uncorrected refractive error (URE) is the leading cause of impaired vision in older adults and has been associated with adverse health outcomes. Here, we investigate the association between URE and frailty in older adults.Methods: This is a cross-sectional analysis of National Health and Nutrition Examination Survey (NHANES) participants ≥60 years (1999–2006 cycles). URE was defined as visual acuity worse than 6/12 that can be improved with correction, and prefrailty and frailty were defined as meeting 1–2 and ≥3 of 4 components of a modified physical frailty phenotype. The 5-item phenotype (including slowness) was analyzed in a subset of participants with available data. Propensity score adjustment was used to address the imbalance of potential confounders (including age) between URE groups.Results: In this sample (n = 5,265), 6% of participants had URE (n = 373). In fully adjusted propensity score-based models, individuals with URE were more likely to be prefrail (OR = 1.4; 95% CI: 1.0–2.0) and frail (OR = 3.2; 95% CI: 1.3–7.4) than those without URE using the 4-item phenotype. For the 2,486 participants with 5-item phenotype data, individuals with URE were more likely to be frail (OR = 3.0; 95% CI: 1.2–7.5); however, the association with prefrailty was not statistically significant (OR = 1.8; 95% CI: 0.9–3.6).Conclusion: In this population-based sample, older adults with URE were more likely to be frail than those without URE, even after rigorous control for confounders, including age.

Episodic reconstruction contributes to high-confidence false recognition memories in older adults: Evidence from event-related potentials

Older adults demonstrate greater susceptibility to high-confidence memory distortions. Cognitive processes underlying memory errors in older adults remain unclear. Here, in a categorized pictures paradigm, we used the event-related potential (ERP) to examine the electrophysiological correlates of false recognition. Young and older participants were presented with categorized pictures during study and subsequently completed an old/new recognition memory task that included studied pictures, lure pictures from studied categories, and new pictures. Behavioral results showed proportionally similar but higher-confidence false memories in older adults compared to young adults. ERP results revealed that false recognition elicited a significant early frontal old/new effect indexing familiarity in young adults, while older adults exhibited a reliable late posterior negativity during false recognition. These findings suggest that episodic reconstruction contributes to high-confidence false memories in older adults.

Patterns of Dementia Treatment and Frank Prescribing Errors in Older Adults With Parkinson Disease

Dementia is common in Parkinson disease, but few data exist on dementia treatment patterns or the concurrent use of acetylcholinesterase inhibitors (ACHEIs) and anticholinergic medications, a frank prescribing error. To describe dementia treatment patterns, and to determine the extent to which the concurrent use of ACHEIs and drugs with strong anticholinergic activity occurs among individuals with Parkinson disease in the United States. This cross-sectional analysis included adult Medicare beneficiaries (aged 65 years or older) with Parkinson disease diagnosis with 12 consecutive months of inpatient, outpatient, and prescription drug coverage from January 1, 2014, through December 31, 2014. Beneficiaries with other parkinsonian syndromes were excluded. Demographic, geographic, prescription claims, and other data were extracted from the 2014 Carrier, Beneficiary Summary, and Prescription Drug Event research identifiable files of the Centers for Medicare & Medicaid Services. Data analysis was conducted from August 1, 2017, to November 30, 2017. Primary outcomes were use of dementia drug, specific dementia medication, and concurrent exposure to a high-potency anticholinergic drug and an ACHEI. Descriptive analyses and multivariable logistic regression models determined the extent to which patient characteristics and comorbid conditions were associated with dementia treatment or with a high-potency anticholinergic and ACHEI never event. Of 268 407 Medicare beneficiaries with Parkinson disease (mean [SD] age, 78.9 [7.5]; 134 575 male [50.1%]), most were identified in the files as white (232 831 [86.7%]), followed by black (14 629 [5.5%]), Hispanic (7176 [2.7%]), Asian (7115 [2.7%]), and Native American (874 [0.3%]). Among these beneficiaries, 73 093 (27.2%) were given a prescription for at least 1 antidementia medication. The most commonly prescribed medication was donepezil hydrochloride (46 027 [63.0%] users), followed by memantine hydrochloride (30 578 [41.8%] users) and rivastigmine tartrate (19 278 [26.4%] users). Dementia drugs were more likely to be prescribed to black (adjusted odds ratio [AOR], 1.33; 95% CI, 1.28-1.38) and Hispanic (AOR, 1.28; 95% CI, 1.22-1.35) beneficiaries and less likely for Native American beneficiaries (AOR, 0.62; 95% CI, 0.51-0.74). Women were less likely than men to be given a prescription for dementia medication (AOR, 0.85; 95% CI, 0.84-0.87). Of the 64 017 beneficiaries receiving an ACHEI, 28 495 (44.5%) experienced at least 1 high-potency anticholinergic-ACHEI event. Hispanic (AOR, 1.11; 95% CI, 1.00-1.23) and women (AOR, 1.30; 95% CI, 1.25-1.35) beneficiaries had greater odds of experiencing this never event. Statistically significant clusters of the prevalence of this prescribing error were observed across the United States (Moran I = 0.24; P < .001), with clusters of high prevalence in the southern and midwestern states. Dementia medication use by persons with Parkinson disease varies by race/ethnicity and sex; potentially inappropriate prescribing is common among those being treated for cognitive impairment and varies by race/ethnicity, sex, and geography. These findings may serve as national and local targets for improving care quality and outcomes for persons with Parkinson disease.

Prevalence and Associated Factors of Uncorrected Refractive Error in Older Adults in a Population-Based Study in France

Uncorrected refractive error (URE) is a common cause of visual impairment, but its prevalence in groups of older adults who could be pragmatic targets for improving optical correction remains unknown. To estimate the prevalence of URE in older adults, particularly in those with age-related eye disease and those who are unable to attend an outpatient clinic, and to identify the factors associated with URE. This population-based cross-sectional analysis included 707 adults 78 years or older from the Alienor Study in Bordeaux, France. Data were collected from February 12, 2011, through December 21, 2012, and analyzed from November 1, 2017, through July 7, 2018. Uncorrected refractive error was defined as the presenting distance visual acuity in the better-seeing eye improved by at least 5 letters on the Early Treatment Diabetic Retinopathy Study chart (≥1 line on the logMAR chart) using the best-achieved optical correction. Multivariate logistic regressions were used to determine the factors associated with URE. The study population of 707 adults 78 years or older (64.8% women; mean [SD] age, 84.3 [4.4] years) had a prevalence of URE of 38.8% (95% CI, 35.2%-42.5%). Prevalence was high for participants with eye disease (range, 35.0% [95% CI, 28.4%-42.0%] to 44.1% [95% CI, 27.2%-62.1%], depending on the disease) and those without eye disease (30.1%; 95% CI, 24.0%-36.7%). Prevalence was higher in participants who were examined at home (because they could not come to the clinic) than in those examined at the clinic (49.4% [95% CI, 42.8%-55.9%] vs 33.5% [95% CI, 29.2%-37.9%]; P < .001). Having an eye examination performed at home (odds ratio [OR], 1.64; 95% CI, 1.13-2.37), living alone (OR, 0.65; 95% CI, 0.47-0.90), and having the perceptions that the ophthalmologist consultation fees are too expensive (OR, 1.94; 95% CI, 1.12-3.36) and that declining visual acuity is normal with aging (OR, 1.47; 95% CI, 1.04-2.08) were all associated with URE. These study results show that the prevalence of URE was high in this population and suggest that preventive strategies aimed at enhancing optical correction could be directed to all older adults and to specific groups by implementing at-home eye examinations for those who have difficulties attending an outpatient clinic and by focusing on those with eye disease who probably already have a regular ophthalmologic follow-up. More studies are needed to evaluate prevalence of URE in different populations and countries with various eye care systems.

Misdiagnosis of Chikungunya Virus Infection: Comparison of Old and Younger Adults

To assess the frequency of diagnostic errors in older adults presenting to the emergency department (ED) with symptoms suggestive of Chikungunya virus infection (CVI) and to compare the rates of misdiagnosis of older and younger adults. Cross-sectional study performed in the University Hospitals of Martinique from retrospective cases. Emergency department. Individuals aged 65 and older who attended the ED and underwent reverse transcription polymerase chain reaction (RT-PCR) testing for CVI between January and December 2014 (n=333, mean age 80±8) were considered eligible and were compared with a randomly selected sample of younger adults (< 65) (n=143, mean age 45±13). Misdiagnosis rates. The rate of misdiagnosis of CVI in the ED was 30.6% in individuals aged 65 and older and 6.3% in those younger than 65 (p<.001). The overdiagnosis rate was 9.0% in individuals aged 65 and older and 3.5% in those younger than 65 (p=.04). The underdiagnosis rate was significantly higher (p<.001) in individuals aged 65 and older (21.6%) than in those younger than 65 (2.8%). Misdiagnosis of CVI during an epidemic is statistically more frequent in older than younger adults because clinical presentation is often atypical in older adults. Specific diagnostic tools for older adults and better awareness of ED physicians of different presentations in different age groups could help to reduce the rate of misdiagnosis of CVI in the ED.

Route previewing results in altered gaze behaviour, increased self-confidence and improved stepping safety in both young and older adults during adaptive locomotion

Older adults with falls risk tend to look away prematurely from targets for safe foot placement to view future hazards; behaviour associated with increased anxiety and stepping inaccuracies. We aimed to determine the effectiveness of route previewing in reducing anxiety and optimizing gaze behaviour and stepping performance of younger and older adults. Nine younger and nine older adults completed six walks with three task complexities over two sessions. Each trial used either an isolated stepping target, or a target followed by either one or two obstacles. Participants with eyes closed, on hearing a signal, opened their eyes and initiated walking (go trials) or stood previewing the route for 10 s before starting (preview trials). Kinematic data were collected using a Vicon motion analysis system. Gaze behaviour was recorded using a Dikablis eye tracker. On average, both older and younger adults fixated the target for significantly longer during walking when they had previewed the route than when they had not. Self-confidence scores were also significantly higher following ‘preview trials’ than ‘go trials’. Stepping performance significantly improved following route previewing (reduced Medial lateral foot placement variability for both groups and reduced anterior/posterior foot placement error in older adults only). These findings implicate route previewing as a potential intervention to increase self-confidence and reduce the risk of tripping in older adults.

Spiral tracing on a touchscreen is influenced by age, hand, implement, and friction.

Dexterity impairments are well documented in older adults, though it is unclear how these influence touchscreen manipulation. This study examined age-related differences while tracing on high- and low-friction touchscreens using the finger or stylus. 26 young and 24 older adults completed an Archimedes spiral tracing task on a touchscreen mounted on a force sensor. Root mean square error was calculated to quantify performance. Root mean square error increased by 29.9% for older vs. young adults using the fingertip, but was similar to young adults when using the stylus. Although other variables (e.g., touchscreen usage, sensation, and reaction time) differed between age groups, these variables were not related to increased error in older adults while using their fingertip. Root mean square error also increased on the low-friction surface for all subjects. These findings suggest that utilizing a stylus and increasing surface friction may improve touchscreen use in older adults.

Intraindividual reaction time variability predicts prospective memory failures in older adults

ABSTRACTThis study investigated the relationship between intraindividual variability (IIV) in reaction time and prospective memory errors in older adults using data from the Zurich Longitudinal Study of Cognitive Aging (n = 336 individuals aged 66–81 years). The results indicated that increased IIV measured from independent tasks was associated with a greater proportion of prospective memory errors. These significant findings were not influenced by age and did not vary according to prospective memory cue type. Variability is thought to reflect fluctuations in attentional and executive control and these attentional processes may also impact on prospective memory through failure to detect the target cue. The findings suggest, therefore, that measures of variability may have some potential in the identification of older persons who are more vulnerable to everyday errors such as prospective memory failures.

Reporting error in weight and height among older adults: Implications for estimating healthcare costs

Abstract Previous research has identified obesity as a major contributor to healthcare costs among older adults. A limitation of this literature is its reliance on self-reported measures of weight and height, which may contain substantial error that can lead to bias in estimates of obesity prevalence and coefficients in healthcare utilization regressions. This paper estimates the extent of reporting error in weight and height among older adults, and examines its implications for estimating healthcare costs within this population. Moreover, this paper is the first to apply methods to correct for reporting error in weight and height to an older adult sample, and examine the extent to which these methods reduce bias from reporting error. Previous research on reporting error in weight has focused on working-age adults, but older adults are likely to have different patterns of misreporting due to declines in cognition, changes in body composition, and other age-related factors. We find substantial error in older adults’ reports of weight and height, and this error is neither classical nor independent of common regressors in econometric models. Use of self-reports leads to bias in estimates of mean BMI, obesity prevalence, coefficients in healthcare utilization regressions, and obesity-attributable healthcare costs. Correction algorithms can reduce but not eliminate bias, and in certain cases they can actually worsen bias. These findings have implications for accurate estimates of the impact of obesity on healthcare utilization and costs among older adults.

Using warnings to reduce categorical false memories in younger and older adults

Warnings about memory errors can reduce their incidence, although past work has largely focused on associative memory errors. The current study sought to explore whether warnings could be tailored to specifically reduce false recall of categorical information in both younger and older populations. Before encoding word pairs designed to induce categorical false memories, half of the younger and older participants were warned to avoid committing these types of memory errors. Older adults who received a warning committed fewer categorical memory errors, as well as other types of semantic memory errors, than those who did not receive a warning. In contrast, young adults' memory errors did not differ for the warning versus no-warning groups. Our findings provide evidence for the effectiveness of warnings at reducing categorical memory errors in older adults, perhaps by supporting source monitoring, reduction in reliance on gist traces, or through effective metacognitive strategies.

Untimed Design Fluency in Aging and Alzheimer’s Disease: Psychometrics and Normative Data

Design fluency tests, commonly used in both clinical and research contexts to evaluate nonverbal concept generation, have the potential to offer useful information in the differentiation of healthy versus pathological aging. Although normative data for older adults (OAs) are available for multiple timed versions of this test, similar data have been unavailable for a previously published untimed test, the Graphic Pattern Generation Test (GPG). Time constraints common to almost all of the available design fluency tests may cloud interpretation of higher-level executive abilities—for example, in individuals with slow processing speed. The current study examined the psychometric properties of the GPG and presents normative data in a sample of 167 healthy OAs and 110 individuals diagnosed with Alzheimer’s disease (AD). Results suggest that a brief version of the GPG can be administered reliably and that this short form has high test–retest and interrater reliability. Number of perseverations was higher in individuals with AD as compared with OAs. A cutoff score of 4 or more perseverations showed a moderate degree of sensitivity (76%) and specificity (37%) in distinguishing individuals with AD and OAs. Finally, perseverations were associated with nonmemory indexes, thereby underscoring the nonverbal nature of this error in OAs and individuals with AD.