Preterm Neonatal Intensive Care Unit Research Articles

Characteristics of intestinal microbiome in very low birth weight preterm neonatal intensive care unit patients

characteristics of intestinal microbiome in very low birth weight preterm neonatal intensive care unit patients

Neonatal Intensive Care Unit Resource Use for Infants at 22 Weeks’ Gestation in the US, 2008-2021

During the past decade, clinical guidance about the provision of intensive care for infants born at 22 weeks' gestation has changed. The impact of these changes on neonatal intensive care unit (NICU) resource utilization is unknown. To characterize recent trends in NICU resource utilization for infants born at 22 weeks' gestation compared with other extremely preterm infants (≤28 weeks' gestation) and other NICU-admitted infants. This is a serial cross-sectional study of 137 continuously participating NICUs in 29 US states from January 1, 2008, through December 31, 2021. Participants included infants admitted to the NICU. Data analysis was performed from October 2022 to August 2023. Year and gestational age at birth. Measures of resource utilization included NICU admissions, NICU bed-days, and ventilator-days. Of 825 112 infants admitted from 2008 to 2021, 60 944 were extremely preterm and 872 (466 [53.4%] male; 18 [2.1%] Asian; 318 [36.5%] Black non-Hispanic; 218 [25.0%] Hispanic; 232 [26.6%] White non-Hispanic; 86 [9.8%] other or unknown) were born at 22 weeks' gestation. NICU admissions at 22 weeks' gestation increased by 388%, from 5.7 per 1000 extremely preterm admissions in 2008 to 2009 to 27.8 per 1000 extremely preterm admissions in 2020 to 2021. The number of NICU admissions remained stable before the publication of updated clinical guidance in 2014 to 2016 and substantially increased thereafter. During the study period, bed-days for infants born at 22 weeks increased by 732%, from 2.5 per 1000 to 20.8 per 1000 extremely preterm NICU bed-days; ventilator-days increased by 946%, from 5.0 per 1000 to 52.3 per 1000 extremely preterm ventilator-days. The proportion of NICUs admitting infants born at 22 weeks increased from 22.6% to 45.3%. Increases in NICU resource utilization during the period were also observed for infants born at less than 22 and at 23 weeks but not for other gestational ages. In 2020 to 2021, infants born at less than or equal to 23 weeks' gestation comprised 1 in 117 NICU admissions, 1 in 34 of all NICU bed-days, and 1 in 6 of all ventilator-days. In this serial cross-sectional study of 137 US NICUs from 2008 to 2021, an increasing share of resources in US NICUs was allocated to infants born at 22 weeks' gestation, corresponding with changes in national clinical guidance.

Heart rate patterns predicting cerebral palsy in preterm infants.

Heart rate (HR) patterns can inform on central nervous system dysfunction. We previously used highly comparative time series analysis (HCTSA) to identify HR patterns predicting mortality among patients in the neonatal intensive care unit (NICU) and now use this methodology to discover patterns predicting cerebral palsy (CP) in preterm infants. We studied NICU patients <37 weeks' gestation with archived every-2-s HR data throughout the NICU stay and with or without later diagnosis of CP (n = 57 CP and 1119 no CP). We performed HCTSA of >2000 HR metrics and identified 24 metrics analyzed on HR data from two 7-day periods: week 1 and 37 weeks' postmenstrual age (week 1, week 37). Multivariate modeling was used to optimize a parsimonious prediction model. Week 1 HR metrics with maximum AUC for CP prediction reflected low variability, including "RobustSD" (AUC 0.826; 0.772-0.870). At week 37, high values of a novel HR metric, "LongSD3," the cubed value of the difference in HR values 100 s apart, were added to week 1 HR metrics for CP prediction. A combined birthweight + early and late HR model had AUC 0.853 (0.805-0.892). Using HCTSA, we discovered novel HR metrics and created a parsimonious model for CP prediction in preterm NICU patients. We discovered new heart rate characteristics predicting CP in preterm infants. Using every-2-s HR from two 7-day periods and highly comparative time series analysis, we found a measure of low variability HR week 1 after birth and a pattern of recurrent acceleration in HR at term corrected age that predicted CP. Combined clinical and early and late HR features had AUC 0.853 for CP prediction.

Neurodevelopmental Outcomes in Preterm Babies: A 12-Month Observational Study.

Background Preterm births are a significant concern worldwide due to their association with both short- and long-term morbidity. Modern neonatal intensive care techniques have improved the survival of infants born at the brink of viability. However, there remain significant challenges concerning their neurodevelopment. A considerable proportion of very low birth weight infants exhibit significant motor deficits such as cerebral palsy or cognitive, behavioral, or attention disabilities. The consequences of these impairments, particularly given their life-long nature, can be severe for the affected individuals, families, and public health resources. Consequently, timely neurodevelopmental assessment is critical in recognizing delayed development and selecting infants for neurodevelopmental stimulation. This study aimed to estimate the neurodevelopment of preterm infants, identify influencing factors, detect at-risk groups, and refer/recommend early intervention when developmental delays are observed. Methodology This prospective, observational, hospital-based study done in the department of pediatrics, Gujarat Medical Education and Research Society (GMERS) Medical College and Hospital, Gotri, Vadodara, Gujrat, India included inborn and outborn preterm neonates admitted to the Neonatal Intensive Care Unit (NICU) or the Sick Newborn Care Unit from their first day of life. The study period was from October 2020 to January 2021, and only neonates with an uncomplicated clinical course were included. Newborns were enrolled in a high-risk clinic, and follow-up appointments were scheduled at three, six, nine, and 12 months of corrected gestational age (CGA). We used the Baroda Developmental Screening Tool (BDST) to calculate the developmental quotient (DQ) at each appointment. This assessment involved parental interviews, observation of developmental milestones, and simple test demonstrations. The gathered DQ data at different ages were analyzed and compared across groups. Results Of 100 preterms enrolled, 62 preterms were followed up until 12 months of CGA. Thirteen patients out of the 62(approximately one-fifth) preterm neonates exhibited developmental delays at one year of CGA, most of whom were early preterm infants. Twenty-six patients (approximatelytwo-fifths) were delayed at three months of CGA, and thus 13 patients (half) showed catch-up growth and development. There was no statistically significant difference between the neurodevelopment of female and male infants. However, infants born to mothers with better socioeconomic status and higher education showed improved neurodevelopment. Conclusions Our study findings suggest that preterm infants discharged from the NICU exhibit poor neurodevelopmental outcomes, especially those born early preterm. This pattern indicates an inverse relationship between neurodevelopmental delay and the maturity of the neonate. Maternal education and socioeconomic status positively impacted the neurodevelopment of preterm NICU graduates. Thus, regularfollow-up (at least once every three months), early detection by a screening scale like the BDSTand intervention significantly improved neurodevelopmental outcomes.

Association Between Platelet-to-Lymphocyte Ratio and Preterm Necrotizing Enterocolitis.

Introduction: Necrotizing enterocolitis (NEC) is a fatal condition for very-low-birth-weight infants. Necrotizing enterocolitis is a multi-factor phenomenon that results in intestinal mucosal damage and leads to intestinal necrosis. However, sensitive laboratory indicators for NEC are lacking, making early diagnosis difficult. This study aimed to explore the relationship between the platelet-to-lymphocyte ratio (PLR) and NEC in preterm neonates to enable an earlier diagnosis of the condition.Methods: This was a retrospective case–control study of preterm neonates diagnosed with NEC between January 2018 and December 2019 in the West China Second University Hospital. Controls were selected from preterm neonatal intensive care unit (NICU) graduates, and they were matched for gestation and year of birth to the preterms diagnosed without NEC. In total, 93 and 107 infants were included in the NEC and control groups, respectively. Empowerstats analysis was used to identify the association between PLR and preterm NEC.Results: The NEC group had significantly higher PLR levels than the control group. PLR > 100 within 1 week before NEC diagnosis was a risk factor for NEC. There was a positive connection between PLR and preterm NEC. A PLR of >100 was determined as the optimal cutoff for predicting preterm NEC, with patients with PLR >100 having a higher risk of NEC [odds ratio (OR): 18.82 (95% confidence interval (CI): 2.93–120.98), p = 0.002].Conclusions: A PLR of >100 within 1 week after clinical abnormalities is associated with a high risk of NEC in preterm neonates.

Adverse Impact of Rheumatoid Arthritis on Pregnancy Outcomes: A Saudi Arabia Prospective Multicenter Study.

BackgroundRheumatoid arthritis (RA) is associated with adverse pregnancy outcomes and postpartum complications, especially with severe disease activity.ObjectiveThe current study aimed to compare the pregnancy outcomes in patients with RA and healthy controls as well as to assess the impact of disease-related variables, medications and disease activity on pregnancy and neonatal-related outcomes in the Saudi population.MethodsThis prospective multicenter study included pregnant female patients with RA from three tertiary centers in Saudi Arabia. The demographics, disease activity scoring (DAS28-CRP), medication before and during pregnancy, pregnancy-related outcomes, and complications in comparison to age-matched healthy female controls were noted.ResultsA total of 77 pregnant patients with RA and 250 healthy age-matched pregnant controls were included in the study. A total of 67.53% were in remission before conception (DAS28CRP ≤2.6), and 81.8% of pregnancies were planned. Age of conception, preterm labor, neonatal intensive care unit (NICU) admission and low birth weight were statistically significant (p <0.05) and higher in RA patients than in healthy controls. Longer disease duration (p <0.001), and high C-reactive protein and erythrocyte sedimentation rate levels before conception (p ≤0.001) were statistically associated with preterm NICU admission. There was statistically significant association between mild (p = 0.015) or moderate to severe DAS28-CRP (p = 0.001) and RA patients regarding pregnancy outcomes. The classification table obtained from the logistic model showed patients with mild and moderate-severe DAS28-CRP have significantly high chances of having an adverse pregnancy outcome.ConclusionRA has a negative impact on pregnancy-related outcomes. Higher disease activity is considered a major risk; thus, tight disease control should be aimed. Planned pregnancy follow-up is associated with better pregnancy outcomes.

Need for a structured policy for discharging high-risk preterm neonatal intensive care unit graduate in the coronavirus disease pandemic era

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Kangaroo father care: A pilot feasibility study of physiologic, biologic, and psychosocial measures to capture the effects of father-infant and mother-infant skin-to-skin contact in the Neonatal Intensive Care Unit.

Robust literature supports the positive effects of kangaroo mother care (KMC) on infant physiologic stability and parent-infant bonding in the Neonatal Intensive Care Unit (NICU). Comparatively little is known about kangaroo father care (KFC) in the NICU, and KFC implementation has been limited. Our pilot feasibility study objective was to examine KFC effects on premature infants and fathers as compared to KMC. Parents of preterm NICU infants independently completed a 90-min Kangaroo Care (KC) session on consecutive days. Infant heart rate variability (HRV) and apnea/periodicity measures were compared (pre-KC to KC; KFC to KMC). Additionally, we assessed the feasibility of administering three psychosocial questionnaires to fathers and mothers in the NICU and after discharge. Ten preterm infants completed 20 KC sessions (334/7 -374/7 weeks post-menstrual age). Results demonstrated similar infant physiologic responses between KMC and KFC, including significant differences in measures of HRV (p<.05) between KC and non-KC periods. Eighty-eight percentage of questionnaires administered were completed, supporting the utilization of these instruments in future research of this population. If confirmed, these preliminary results identify an opportunity to objectively assess KFC effects, supporting the development of empirically based KFC programs benefitting NICU families.

Duration of breastmilk feeding of NICU graduates who live with individuals who smoke.

Background:Breastmilk has many benefits for infants, but initiating breastfeeding/pumping can be difficult for mothers of preterm infants, especially those who smoke (or live with individuals who smoke). The primary aim of this study was to identify risks for breastfeeding/pumping cessation with neonatal ICU (NICU) infants’ mothers who smoke or live with individuals who smoke, using a novel survival-analytic approach.Methods/design:Mothers (N=360) were recruited for a secondhand-smoke-prevention intervention during infants’ NICU hospitalizations and followed for approximately six months after infant discharge. Data were obtained from medical records and participant selfreport/interviews.Results:The sample was predominantly ethnic/racial minorities; mean age was 26.8 (SD=5.9) years. One-fifth never initiated breastfeeding/pumping (n=67; 18.9%) and mean time-to-breastfeeding cessation was 48.1 days (SD=57.2; Median=30.4 [IQR: 6.0-60.9]). Education, length-of-stay, employment, race/ethnicity, number of household members who smoke, and readiness-to-protect infants from tobacco smoke were significantly associated with breastfeeding cessation. Further, infants fed breastmilk for ≥4 months had 42.7% more well-child visits (p<0.001) and 50.0% fewer respiratory-related clinic visits (p<0.05).Discussion:One-quarter of infants admitted to NICUs will be discharged to households where individuals who smoke live; we demonstrated that smoking-related factors were associated with mothers’ breastfeeding practices. Infants who received breastmilk longer had fewer respiratory-related visits.

An integrative review: maternal engagement in the neonatal intensive care unit and health outcomes for U.S.-born preterm infants and their parents.

Hospitals and perinatal organizations recognize the importance of family engagement in the neonatal intensive care unit (NICU). The Agency for Healthcare Research and Quality (AHRQ) defines family engagement as “A set of behaviors by patients, family members, and health professionals and a set of organizational policies and procedures that foster both the inclusion of patients and family members as active members of the health care team and collaborative partnerships with providers and provider organizations.” In-unit barriers and facilitators to enhance family engagement are well studied; however, less is known specifically about maternal engagement's influence in the NICU on the health of infants and mothers, particularly within U.S. social and healthcare contexts. In this integrative review, we examine the relationship between maternal engagement in the NICU and preterm infant and maternal health outcomes within the U.S. Results from the 33 articles that met inclusion criteria indicate that maternal engagement in the NICU is associated with infant outcomes, maternal health-behavior outcomes, maternal mental health outcomes, maternal-child bonding outcomes, and breastfeeding outcomes. Skin-to-skin holding is the most studied maternal engagement activity in the U.S. preterm NICU population. Further research is needed to understand what types of engagement are most salient, how they should be measured, and which immediate outcomes are the best predictors of long-term health and well-being.

Erratum: Wideband acoustic immittance for assessing middle ear functioning for preterm neonates in the neonatal intensive care unit.

No abstract available.

Variability in Immunization Practices for Preterm Infants.

The Advisory Committee on Immunization Practices and the American Academy of Pediatrics (AAP) recommend the same immunization schedule for preterm and term infants. However, significant delays in vaccination of premature infants have been reported. The objective of this study was to assess the variability of immunization practices in preterm infants. We conducted an online survey of 2,443 neonatologists in the United States, who are members of the Section for Neonatal-Perinatal Medicine of the AAP. Questions were targeted at immunization practices in the neonatal intensive care unit (NICU). Of the 420 responses (17%) received, 55% of providers administer the first vaccine at >2-month chronological age. Most providers (83%) surveyed reported delaying vaccines in the setting of clinical illness. Sixty percent reported increasing frequency of apnea-bradycardia events following immunization. More than half administer the initial vaccines over several days despite lack of supporting data. Reported considerations in delaying or spreading out 2-month vaccines were clinical instability, provider preference, lower gestational age, and lower birth weight. This survey substantiates the variability of immunizations practices in the NICU and identifies reasons for this variability. Future studies should inform better practice guidance for immunization of preterm NICU patients based on vaccine safety and effectiveness.

Implementation of a multidisciplinary guideline improves preterm infant admission temperatures.

Hypothermia is a common problem in preterm infants immediately following delivery.Local problem:The rate of admission hypothermia in our neonatal intensive care unit (NICU) was above the rate of comparable NICUs in the Vermont Oxford Network. To reduce the rate of preterm admission hypothermia, a quality improvement (QI) project was implemented, utilizing the plan-do-study-act (PDSA) methodology. A guideline for delivery room thermoregulation management in <35-week infants at the University of Virginia was created and put into practice by a multidisciplinary team. Clinical practice changes in the guideline included: increasing operating room temperatures, obtaining a 10-min axillary temperature, using an exothermic mattress for all infants <35 weeks, and using a polyethylene wrap for infants <32 weeks. The baseline rate of hypothermia (<36.5 °CC) was 63%. Three PDSA cycles data were completed on 168 consecutive preterm births. The post-implementation rate of hypothermia (<36.5 °C) was reduced to 30% (P<0.001). The incidence of moderate hypothermia (< 36 °C) was reduced from a baseline of 29% to a rate of 9% (P<0.001). Use of a multidisciplinary guideline to increase preterm NICU admission temperatures resulted in a decrease in hypothermic infants.

Wideband acoustic immittance for assessing middle ear functioning for preterm neonates in the neonatal intensive care unit.

BackgroundThe primary aim of newborn hearing screening is to detect permanent hearing loss. Because otoacoustic emissions (OAEs) and automated auditory brainstem response (AABR) are sensitive to hearing loss, they are often used as screening tools. On the other hand, false-positive results are most often because of transient outer- and middle ear conditions. Wideband acoustic immittance (WAI), which includes physical measures known as reflectance and absorbance, has shown potential for accurate assessment of middle ear function in young infants.ObjectiveThe main objective of this study was to determine the feasibility of WAI as a diagnostic tool for assessing middle ear functioning in preterm neonates in the neonatal intensive care unit (NICU) designed for premature and ill neonates. A further objective was to indicate the difference between the reflectance values of tones and click stimuli.MethodFifty-six at-risk neonates (30 male and 26 female), with a mean age at testing of 35.6 weeks (range: 32–37 weeks) and a standard deviation of 1.6 from three private hospitals, who passed both the distortion product otoacoustic emission (DPOAE) and AABR tests, were evaluated prior to discharge from the NICU. Neonates who presented with abnormal DPOAE and AABR results were excluded from the study. WAI was measured by using chirp and tone stimuli. In addition to reflectance, the reflectance area index (RAI) values were calculated.ResultsBoth tone and chirp stimuli indicated high-power reflectance values below a frequency of 1.5 kHz. Median reflectance reached a minimum of 0.67 at 1 kHz – 2 kHz but increased to 0.7 below 1 kHz and 0.72 above 2 kHz for the tone stimuli. For chirp stimuli, the median reflectance reached a minimum of 0.51 at 1 kHz – 2 kHz but increased to 0.68 below 1 kHz and decreased to 0.5 above 2 kHz. A comparison between the present study and previous studies on WAI indicated a substantial variability across all frequency ranges.ConclusionThese WAI measurements conducted on at-risk preterm NICU neonates (mean age at testing: 35.6 weeks, range: 32–37 weeks) identified WAI patterns not previously reported in the literature. High reflective values were obtained across all frequency ranges. The age of the neonates when tested might have influenced the results. The neonates included in the present study were very young preterm neonates compared to the ages of neonates in previous studies. WAI measured in at-risk preterm neonates in the NICU was variable with environmental and internal noise influences. Transient conditions affecting the sound-conduction pathway might have influenced the results. Additional research is required to investigate WAI testing in ears with and without middle ear dysfunction. The findings of the current study imply that in preterm neonates it was not possible to determine the feasibility of WAI as a diagnostic tool to differentiate between ears with and without middle ear pathology.

Effect of oral administration of probiotics on intestinal colonization with drug-resistant bacteria in preterm infants

Background Oral administration of probiotics in newborn preterm infants has been shown to be helpful, especially ın reducıng the incidence of necrotizing enterocolitis and overall mortality rates.Objective To evaluate the effect of probıotıc supplementation on ıntestınal colonization by antibiotic-resistant microorganisms in preterm infants receiving antibiotics in a neonatal intensive care unit (NICU).Methods The prospective, randomized trial was performed ın preterm infants who were hospitalized in the NICU at Baskent University Ankara Hospital between January 2011 and February 2012. A total of 51 infants were enrolled and randomly assigned to one of two groups: Group 1 (n=27) received probiotic therapy and Group 2 (n=24) did not receive probiotics. The probiotic used was Lactobacillus reuteri (Biogaia® AB, Sweden). Subjects underwent weekly nasal swab and stool cultures for a maxımum of 6 weeks, and at the tıme of dıscharge ıf thıs was prıor to 6 weeks. All posıtıve cultures were further tested for culture-specıfıc ıdentıfıcatıon and antıbıotıc suceptibility.Results A total of 607 cultures were evaluated. Posıtıve cultures were found ın 37.9% from Group 1 and 35.2% from Group 2. Intestınal colonızatıon by antıbıotıc-resıstant bacterıa dıd not sıgnıfıcantly dıffer between groups (P&gt;0.05). Conclusions Oral supplementation with probiotics do not prevent the intestınal colonization of antibiotic-resistant microorganisms in preterm NICU patıents who receıved antıbıotıc treatment.

Outborns or Inborns: Where Are the Differences? A Comparison Study of Very Preterm Neonatal Intensive Care Unit Infants Cared for in Australia and New Zealand and in Canada

Background: Very preterm infants born outside tertiary centers are at higher risks of adverse outcomes than inborn infants. Regionalization of perinatal care has been introduced worldwide to improve outcomes. Objective: To compare the risk-adjusted outcomes of both inborn and outborn infants cared for in tertiary neonatal intensive care units in Australia and New Zealand and in Canada. Methods: Deidentified data of infants <32 weeks' gestational age from the 29 Australian and New Zealand Neonatal Network units (ANZNN; n = 9,893) and 26 Canadian Neonatal Network units (CNN; n = 7,133) between 2005 and 2007 were analyzed for predischarge adverse outcomes. Results: ANZNN had lower rates of outborns compared to CNN (13 vs. 19%), particularly of late admissions (>2 days of age; 5.8 vs. 22.2% of outborns) who had high morbidity rates. After adjusting for confounding variables including gestation, ANZNN inborn infants had lower odds of chronic lung disease [CLD; 17.0 vs. 23.3%; adjusted odds ratio (AOR) = 0.70, 95% CI: 0.64-0.77], severe neurological injuries on ultrasound (SNI; 4.1 vs. 6.7%; AOR = 0.62, 95% CI: 0.53-0.73), severe retinopathy (5.6 vs. 7%; AOR = 0.71, 95% CI: 0.59-0.84) and necrotizing enterocolitis (3.5 vs. 5.4%; AOR = 0.67, 95% CI: 0.56-0.79), but no difference in mortality odds. After excluding the late outborn admissions, ANZNN outborns had lower odds of SNI (AOR = 0.43, 95% CI: 0.32-0.58) and CLD (AOR = 0.63, 95% CI: 0.49-0.81) than CNN. Conclusions: ANZNN inborn and early admitted outborn infants had lower odds of neonatal morbidities than their CNN counterparts. However, compared to ANZNN, the higher CNN rates of outborns and their late admissions are likely related to the differences in regionalization and referral practices, and may explain differences in outcomes.

Auditory brainstem response morphology and analysis in very preterm neonatal intensive care unit infants

Analysis of auditory brainstem response (ABR) in very preterm infants can be difficult owing to the poor detectability of the various components of the ABR. We evaluated the ABR morphology and tried to extend the current assessment system. Prospective cohort study. We included 28 preterm very low birth weight infants admitted to the neonatal intensive care unit of Sophia Children's Hospital. ABRs were measured between 26 and 34 weeks postconceptional age. The presence of the following ABR parameters was recorded: the ipsilateral peaks I, III and V, the contralateral peaks III and V, and the response threshold. In 82% of our population, a typical "bow tie" response pattern was present as a sign of early auditory development. This bow tie pattern is the narrowest part of the response wave and is predominantly characterized by the ipsilateral negative peak III. This effect may be emphasized by the contralateral peak III. The bow tie pattern is seen approximately 0.1 milliseconds before the ipsilateral peak III. From 30 weeks postconceptional age onward, a more extensive morphologic pattern is recorded in 90% of the infants. A flow chart was designed to analyze the ABR morphology of preterm infants in an unambiguous stepwise fashion. A typical bow tie pattern preceding peak III seems to be the earliest characteristic of the developing ABR morphology in preterm infants. As ABR characteristics will improve with increasing age, neonatal hearing screening should be postponed until after 34 weeks.

Responses to pain in school-aged children with experience in a neonatal intensive care unit: Cognitive aspects and maternal influences

Previously, it was shown that school-aged (9–14 yr) preterm and fullterm children with neonatal pain exposure exhibit elevated heat pain thresholds and heightened perceptual sensitization to tonic painful heat when tested under standard conditions [Hermann C, Hohmeister J, Demirakca S, Zohsel K, Flor H. Long-term alteration of pain sensitivity in school-aged children with early pain experiences. Pain 2006;125:278–85]. Here, changes in the psychosocial context of pain responses in these children, who had been hospitalized ⩾7 days after birth including ⩾3 days of treatment in a neonatal intensive care unit (NICU), are reported. Nineteen preterm (⩽31 weeks gestational age) and 20 fullterm children (⩾37 weeks gestational age) with NICU experience, recruited retrospectively and selected based on strict exclusion criteria, and 20 fullterm control children participated. Preterm NICU children endorsed more pain catastrophizing as compared to controls. Mothers of preterm children, who had been more severely ill and had been hospitalized longer than fullterm NICU children, were more likely to engage in solicitous pain-related behavior. Maternal influence was also assessed by comparing heat pain thresholds and perceptual sensitization to tonic painful heat obtained in the presence versus absence (i.e. standard testing conditions) of the mother. In all three groups, maternal presence was associated with increased heat pain thresholds. Control children habituated significantly more to tonic heat when their mother was present. The NICU children showed overall significantly less habituation than the controls; there was no modulating effect of maternal presence. Especially in highly vulnerable children such as preterms, neonatal pain exposure and prolonged hospitalization may, aside from neuronal plasticity, promote maladaptive pain-related cognitions and foster parental behavior that reinforces the child’s pain response.

A quantitative use of the NIDCAP tool. The effect of gender and race on very preterm neonates' behavior.

The purpose of this study was to demonstrate how the check sheet of the Newborn Individualized Developmental Care and Assessment Program (NIDCAP) can be quantified and used in research. Using the quantified NIDCAP measures, the hypothesis that Caucasian male infants are less behaviorally competent while in a neonatal intensive care unit (NICU) was explored. Participants included 42 very preterm NICU infants. Eighty-five NIDCAP behaviors were quantified into scores ranging from 0 to 1, indicating the percentage of time each behavior was observed. Multivariate analyses were used in grouping the 85 NIDCAP behaviors into three subsystems of functioning. The hypothesis that Caucasian male infants were less competent was not supported; neither were gender differences found. Contrary to this hypothesis, African American infants were identified as more vulnerable on several behaviors. NIDCAP assessments were easily quantified. Once the entire NIDCAP exam has been quantified, practice applications may involve automated development of individualized care plans.