Chronic Disabling Occupational Musculoskeletal Disorders Research Articles

Does the Length of Disability between Injury and Functional Restoration Program Entry Affect Treatment Outcomes for Patients with Chronic Disabling Occupational Musculoskeletal Disorders?

Purpose Functional restoration programs (FRPs), for patients with chronic disabling occupational musculoskeletal disorders (CDOMDs), have consistently demonstrated positive socioeconomic treatment outcomes, including decreased psychosocial distress and increased work return. The pre-treatment length of disability (LOD), or time between injury and treatment admission, has been shown to influence FRP work outcomes. Some studies have found that shorter LOD is associated with better work outcomes. However, few studies have actually examined cohorts with LOD duration longer than 18 months. This present study evaluated the effects of extended LOD (beyond 18 months) on important treatment outcomes. Methods A total cohort of 1413 CDOMD patients entered an FRP. Of those, 312 did not complete the program, so they were eliminated from outcome analyses. The 1101 patients who completed the FRP were classified based on LOD: Late Rehabilitation (LR, 3-6 months, n = 190); Chronic Disability (CD, 7-17 months, n = 494); and Late Chronic Disability (LCD). The LCD, in turn, consisted of four separate subgroups: 18-23 months (LCD-18, n = 110); 24-35 months (LCD-24, n = 123); 36-71 months (LCD-36, n = 74); and 72+ months (LCD-72, n = 110). Patients were evaluated upon admission and were reassessed at discharge. Those patients who chose to pursue work goals post-treatment (n = 912) were assessed 1-year later. Results Longer LOD was associated with less likelihood of completing the FRP (p < .001). Compared to the other LOD groups, a relatively large percentage of patients (47%) in the longest- disability group were receiving social security disability benefits. Associations were found between longer LOD and more severe patient-reported pain, disability, and depressive symptoms at treatment admission. At discharge, symptom severity decreased for these patient-reported variables in all LOD groups (p < .001). Using binary logistic regressions, it was found that LOD significantly predicted work-return (Wald = 11.672, p = .04) and work-retention (Wald = 11.811, p = .04) after controlling for covariates. Based on the LOD groups, the percentage of patients returning to, and retaining work, ranged from 75.6 to 94.1%, and from 66.7 to 86.3%, respectively. The odds of LCD-24 and LCD-72 patients returning to work were 2.9, and 7.4, respectfully, less likely, compared to LR patients. Furthermore, the odds of LCD-24 and LCD-72 patients retaining work were 3.3 and 3.8 times, respectively, less likely, compared to LR patients. Conclusions Long LOD was a risk factor for FRP non-completion, and was associated with more severe patient-reported variables, including pain intensity and perceived disability. Furthermore, long LOD was a significant predictor for work outcomes at 1year following FRP discharge. Nevertheless, a large percentage of longer LOD (>24 months) patients had returned to work within the year after discharge (above 85%), and had retained at least part-time work 1-year later (above 66%). These results support the effectiveness of the FRP in mitigating the effects of extended LOD in a large percentage of long-term LOD patients.

Does Classification of Chronic Musculoskeletal Disorder Patients Into Psychosocial Subgroups Predict Differential Treatment Responsiveness and 1-Year Outcomes After a Functional Restoration Program?

The objectives of this study: (1) to assess whether Multidimensional Pain Inventory (MPI) profiles predicted differential responses to a functional restoration program (FRP) in chronic disabling occupational musculoskeletal disorder (CDOMD) patients; (2) to examine whether coping style improves following FRP; and (3) to determine whether discharge MPI profiles predict discharge psychosocial and 1-year socioeconomic outcomes. Consecutive CDOMD patients (N=716) were classified into Adaptive Coper (AC, n=209), Interpersonally Distressed (ID, n=154), Dysfunctional (DYS, n=310), and Anomalous (n=43) using the MPI, and reclassified at discharge. Profiles were compared on psychosocial measures and 1-year socioeconomic outcomes. An intent-to-treat sample analyzed the effect of drop-outs on treatment responsiveness. The MPI classification significantly predicted program completion (P=0.001), although the intent-to-treat analyses found no significant effects of drop-out on treatment responsiveness. There was a significant increase in the number of patients who became AC or Anomalous at FRP discharge and a decrease in those who were ID or DYS. Patients who changed or remained as DYS at FRP discharge reported the highest levels of pain, disability, and depression. No significant interaction effect was found between MPI group and time for pain intensity or disability. All groups improved on psychosocial measures at discharge. DYS patients had decreased work retention and a greater health care utilization at 1 year. An FRP was clinically effective for CDOMD patients regardless of initial MPI profiles. The FRP modified profiles, with patients changing from negative to positive profiles. Discharge DYS were more likely to have poor 1-year outcomes. Those classified as Anomalous had a good prognosis for functional recovery similar to ACs.

(172) Perceived injustice as a risk factor in Chronic Disabling Occupational Musculoskeletal Disorder (CDOMD) population: its association with psychosocial distress and sedatives use

(172) Perceived injustice as a risk factor in Chronic Disabling Occupational Musculoskeletal Disorder (CDOMD) population: its association with psychosocial distress and sedatives use

The Potential Utility of the Patient Health Questionnaire as a Screener for Psychiatric Comorbidity in a Chronic Disabling Occupational Musculoskeletal Disorder Population.

The patient health questionnaire (PHQ) is designed for screening psychopathology in primary care settings. However, little is known about its clinical utility in other chronic pain populations, which usually have high psychiatric comorbidities. A consecutive cohort of 546 patients with chronic disabling occupational musculoskeletal disorder (CDOMD) was administered and compared upon psychosocial assessments, including the PHQ and a structured clinical interview for DSM-IV (SCID). Four PHQ modules were assessed: major depressive disorder (MDD), generalized anxiety disorder (GAD), panic disorder (PD), and alcohol use disorders (AUD) [including both alcohol abuse and dependence]. Based on the SCID diagnosis, sensitivity and specificity were determined. The specificity of the PHQ ranged from moderate to high for all 4 PHQ modules (MDD, 0.79; GAD, 0.67; PD, 0.89; AUD, 0.97). However, the sensitivity was relatively low: MDD (0.58); GAD (0.61); PD (0.49); and AUD (0.24). The PHQ was also associated with psychosocial variables. Patients whose PHQ showed MDD, GAD, or PD reported significantly more depressive symptoms and perceived disability than patients who did not (Ps<0.001). Patients with MDD or GAD reported significantly higher pain than those without (Ps<0.001). The strong specificity of the PHQ appears to be its primary strength for this cohort. Due to its high specificity, the PHQ could be employed as an additional screening tool to help rule out potential psychiatric comorbidity in patients with CDOMD. The low sensitivity of the PHQ in this population, however, remains a weakness of the PHQ.

Does the economy affect functional restoration outcomes for patients with chronic disabling occupational musculoskeletal disorders?

To determine how the economy affects psychosocial and socioeconomic treatment outcomes in a cohort of chronic disabling occupational musculoskeletal disorder (CDOMD) patients who completed a functional restoration program (FRP). A cohort of 969 CDOMD patients with active workers' compensation claims completed an FRP (a medically-supervised, quantitatively-directed exercise progression program, with multi-modal disability management). A good economy (GE) group (n = 532) was released to work during a low unemployment period (2005-2007), and a poor economy (PE) group (n = 437) was released during a higher unemployment period (2008-2010). Patients were evaluated upon admission for demographic and psychosocial variables, and were reassessed at discharge. Socioeconomic outcomes, including work return and work retention 1 year post-discharge, were collected. Some significant differences in psychosocial self-report data were found, but most of the effect sizes were small, so caution should be made when interpreting the data. Compared to the PE group, the GE group reported more depressive symptoms and disability at admission, but demonstrated a larger decrease in depressive symptoms and disability and increase in self-reported quality of life at discharge. The PE group had lower rates of work return and retention 1-year after discharge, even after controlling for other factors such as length of disability and admission work status. CDOMD patients who completed an FRP in a PE year were less likely to return to, or retain, work 1-year after discharge, demonstrating that a PE can be an additional barrier to post-discharge work outcomes. A difference in State unemployment rates of <3% (7 vs. 5%) had a disproportionate effect on patients' failure to return to (19 vs. 6%) or retain (28 vs. 15%) work.

Improved Functional Capacity Evaluation Performance Predicts Successful Return to Work One Year After Completing a Functional Restoration Rehabilitation Program

ObjectiveTo evaluate whether functional capacity evaluation (FCE) scores are responsive to functional restoration treatment, and to assess the ability of FCEs at program discharge to predict work outcomes. DesignAn interdisciplinary cohort study of prospectively collected data. SettingA functional restoration center. PatientsA consecutive sample of 354 patients with chronic disabling occupational musculoskeletal disorders (CDOMDs) completed a functional restoration program consisting of quantitatively directed exercise progression and multi-modal disability management with interdisciplinary medical supervision. MethodsEach patient participated in an FCE at admission and discharge from treatment. The results of each FCE yielded the physical demand level (PDL) at which patients were functioning. Patients were initially divided into 5 PDL groups, based on job-of-injury lifting, carrying, and pushing/pulling requirements, for the pre- to posttreatment responsiveness analyses. Patients were subsequently divided into 5 PDL groups, based on their performance on the FCE upon program completion. Main Outcome MeasuresOutcome measures included admission-to-discharge changes in PDLs and 2 specific FCE lifting tasks: isokinetic lifting; and the Progressive Isoinertial Lifting Evaluation (PILE). Socioeconomic outcomes were also evaluated, including post-discharge work return and work retention 1-year after treatment completion. ResultsOverall, 96% of the patients demonstrated improvement in their PDLs from admission to discharge. A majority of patients (56%) were able to achieve a discharge PDL that was comparable to their estimated job-of-injury lifting requirement or higher (P < .001). Lifting ability improved from admission to discharge by approximately 50% (all P < .001). Discharge PDLs predicted both work return (P < .001) and work retention (P < .001) 1 year later. ConclusionsFCE scores were responsive to functional restoration treatment, and the associated discharge PDLs predicted work return after treatment completion and work retention 1 year later.

Does patient-reported insomnia improve in response to interdisciplinary functional restoration for chronic disabling occupational musculoskeletal disorders?

An analysis of prospectively collected data. To evaluate how patient-reported insomnia, in patients with chronic disabling occupational musculoskeletal disorders (CDOMDs), responds to a functional restoration program (FRP), and to investigate the relationships among insomnia, psychosocial factors, medication use, and post-FRP socioeconomic outcomes. Insomnia is commonly reported by patients with chronic pain. A consecutive sample of 262 patients with predominant chronic spinal pain was assessed with the insomnia severity index (ISI) at program admission and discharge. Groups were formed on the basis of the ISI total scores, from no clinically significant insomnia to severe clinical insomnia (SCI). Patient-reported psychosocial measures were administered, medication information was collected, and ISI discharge score categories were compared with 1-year post-FRP socioeconomic outcomes. The Wilcoxon signed rank, repeated measures ANOVAs, ANOVAs and χ tests were performed. The degree of clinical insomnia at admission significantly predicted program completion, P < 0.001. Mean ISI scores improved from admission (M = 17.2) to discharge (M = 10.6, P < 0.001), but a relatively high percentage of patients (36.6%) still reported moderate to severe insomnia symptoms at discharge. The prevalence of SCI decreased by 18.4%, but this remaining group still reported more pain, disability, and depressive symptoms, and demonstrated more use of opioids, sedatives, and antidepressants (P ≤ 0.01), compared with the other insomnia groups at discharge. One year later, only 56% of the patients with severe insomnia at discharge had retained work, whereas 71% to 93% of those with lesser sleep disturbance were still working (P < 0.001). Those with SCI at discharge were 10.4 times less likely to be working than those without clinically significant insomnia. Although insomnia improved for the majority of patients with chronic disabling occupational musculoskeletal disorder, a relatively high percentage continued to report clinically significant insomnia at FRP discharge. Patients with SCI reported more pain, depression, and disability, used more medication, and had poorer work outcomes 1-year post-FRP. 2.

Do Comorbid Fibromyalgia Diagnoses Change After a Functional Restoration Program in Patients With Chronic Disabling Occupational Musculoskeletal Disorders?

A retrospective study of prospectively collected data. To determine whether comorbid fibromyalgia, identified in patients with chronic disabling occupational musculoskeletal disorders (CDOMDs), resolves with a functional restoration program (FRP). Fibromyalgia involves widespread bodily pain and tenderness to palpation. In recent studies, 23% to 41% of patients with CDOMDs entering an FRP had comorbid fibromyalgia, compared with population averages of 2% to 5%. Few studies have examined whether fibromyalgia diagnoses resolve with any treatment, and none have investigated diagnosis responsiveness to an FRP. A consecutive cohort of patients with CDOMDs (82% with spinal disorders and all reporting chronic spinal pain) and comorbid fibromyalgia (N = 117) completed an FRP, which included quantitatively directed exercise progression and multimodal disability management. Diagnosis responsiveness, evaluated at discharge, created 2 groups: those who retained fibromyalgia and those who did not. These groups were compared with chronic regional lumbar pain only patients (LO group, n = 87), lacking widespread pain and fibromyalgia. Of the patients with comorbid fibromyalgia, 59% (n = 69) retained the fibromyalgia diagnosis (RFM group) and 41% (n = 48) lost the fibromyalgia diagnosis (LFM group) at discharge. Although all 3 groups reported decreased pain intensity, disability, and depressive symptoms from admission to discharge, RFM patients reported higher symptom levels than the LFM and LO groups at discharge. The LFM and LO groups were statistically similar. At 1-year follow-up, LO patients demonstrated higher work retention than both fibromyalgia groups (P < 0.03). Despite a significant comorbid fibromyalgia prevalence in a cohort of patients with CDOMDs entering an FRP, 41% of patients with an initial fibromyalgia diagnosis no longer met diagnostic criteria for fibromyalgia at discharge and were indistinguishable from LO patients on pain, disability, and depression symptoms. However, both fibromyalgia groups (LFM and RFM) had lower work retention than LO patients 1 year later, suggesting that an FRP may suppress symptoms of fibromyalgia in a subset of patients, but prolonged fibromyalgia-related disability may be more difficult to overcome. 2.

(161) The role of insomnia in chronic disabling occupational musculoskeletal disorders (CDOMD)

(161) The role of insomnia in chronic disabling occupational musculoskeletal disorders (CDOMD)

Somatization as a predictor of outcomes following functional restoration of Chronic Disabling Occupational Musculoskeletal Disorders (CDOMD) patients

Chronic disabling occupational musculoskeletal disorders (CDOMDs) result from both psychosocial and physical factors, and patients with CDOMD often have comorbid psychiatric conditions. The Patient Health Questionnaire (PHQ) was developed to simplify DSM-IV diagnoses. One module, the PHQ-15, was developed to measure common somatic symptoms and indicate probable Somatoform disorder. Somatization is present when somatic symptoms such as pain, dizziness, or nausea are medically unexplained. In a prospective cohort study, 1458 CDOMD patients from 2003-2010 completed functional restoration, consisting of quantitatively-directed exercise progression and multi-modal disability management. Patients were divided into 3 categories based upon a cluster analysis of pre-treatment PHQ-15 scores: low somatization (n = 501), moderate somatization (n=817), and high somatization (n=140). Somatization groups were compared on demographic, psychosocial, and one-year socioeconomic outcomes such as work return and work retention. Results found the PHQ-15 highly responsive to treatment, with a 45% decrease in the number of high somatizers at post-treatment, an 18% decrease in the number of moderate somatizers at post-treatment, and a 42% increase in the number of mild somatizers at post-treatment (indicating improvement). Patients with moderate or high levels of somatization at pre-treatment were more likely to be female, have longer disability, and have multiple injuries. Moderate or high somatizers also had significantly worse psychosocial outcomes: at both pre and post-treatment, they exhibited more depressive symptoms, self-reported disability and pain intensity, and lower health-related quality of life (p ≤ .02). One-year after discharge, those who continued to have somatization at post-treatment had lower work retention rates, and were more likely to have high health care utilization and surgery on the original injury (p ≤ .05). These results suggest that the PHQ-15 somatization subscale can act as a “red flag,” since somatization patients exhibit worse psychosocial and one-year objective socioeconomic outcomes, such as work retention and health-care utilization.

The Clinical Utility of the Multidimensional Pain Inventory (MPI) in Characterizing Chronic Disabling Occupational Musculoskeletal Disorders

The Multidimensional Pain Inventory (MPI) was designed to help capture unique characteristics of chronic pain patients. The present study examined the proportion of subgroups classified by the MPI in a chronic disabling occupational musculoskeletal disorder (CDOMD) patient cohort, and described characteristics of MPI profile groups in terms of other psychosocial variables. A cohort of 1,270 CDOMD patients undergoing an interdisciplinary functional restoration program was studied. Before the start of the program, all patients received a standard psychosocial assessment battery. A MPI computer program scored and identified pre-defined MPI subgroups: Adaptive Coper (AC); Interpersonally Distressed (ID); and Dysfunctional (DYS). The distribution of MPI profiles for CDOMD patients was similar with those of highly disabled patients, with the largest proportion of patients having the DYS profile (44 %), followed by AC (33 %) and ID (23 %). The DYS profile group showed the highest level of pain severity, and psychosocial distress; the ID group had a moderate level; and the AC profile group had the lowest level. Higher rates of psychiatric disorders were also found in the DYS and ID groups. The DYS profile group was less likely to complete the treatment program. The present study further demonstrated the clinical utility of the MPI classification in a large cohort of CDOMD patients, indicating that the MPI profiles successfully distinguish among patients who may require extra psychosocial attention to achieve successful treatment gains and program completion.

Prediction of Failure to Retain Work 1 Year After Interdisciplinary Functional Restoration in Occupational Injuries

Brede E, Mayer TG, Gatchel RJ. Prediction of failure to retain work 1 year after interdisciplinary functional restoration in occupational injuries. ObjectiveTo identify risk factors for work retention (a patients' ability to both obtain and retain employment) at 1 year after treatment for a chronic disabling occupational musculoskeletal disorder (CDOMD). DesignProspective cohort study. SettingConsecutive patients undergoing interdisciplinary functional restoration treatment in a regional rehabilitation referral center. ParticipantsA sample of 1850 consecutive CDOMD patients, who were admitted to and completed a functional restoration program, were subsequently classified as work retention or nonwork retention at a 1-year posttreatment evaluation. InterventionsNot applicable. Main Outcome MeasuresMeasures, including medical evaluations, demographic and occupational data, psychosocial diagnostic evaluation, and validated measures of pain, disability, and depressive symptoms, were obtained at admission to, and discharge from, the program. ResultsUsing a multivariate logistic regression analysis, the following variables were found to be significant predictors of failure to retain work: older age (odds ratio [OR]=1.84; 95% confidence interval [CI], 1.33–2.54), female sex (OR=1.46; 95% CI, 1.09–1.94), nonworking status at discharge (OR=1.65; 95% CI, 1.11–2.45), extreme disability at admission (OR=1.46; 95% CI, 1.06–2.00), antisocial personality disorder (OR=2.11; 95% CI, 1.09–4.08), receipt of government disability benefits at admission (OR=2.28; 95% CI, 1.06–4.89), and dependence on opiate pain medications (OR=1.43; 95% CI, 1.02–2.00). The final model improved prediction by 75% over assigning all patients to the larger (work retention) group. ConclusionsThis study identified demographic, psychosocial, and occupational factors that were predictive of failure to retain work. These risk factors may be used to individualize treatment plans for CDOMD patients in order to provide optimal functional restoration.

The Pain Anxiety Symptoms Scale Fails to Discriminate Pain or Anxiety in a Chronic Disabling Occupational Musculoskeletal Disorder Population

The Pain Anxiety Symptoms Scale (PASS) was developed to measure fear and anxiety responses to pain. Many studies have found associations between PASS scores and self-report measures of pain, anxiety, and disability as well as among inhibited movement patterns and activity avoidance behaviors (eg, kinesophobia). This study aimed to identify clinically meaningful cut-off points to identify high or low levels of pain anxiety and to determine if the PASS provides additional useful information in a functional restoration (FR) treatment program for chronic disabling occupational musculoskeletal disorder (CDOMD) patients. A consecutive cohort of 551 patients with CDOMD, who entered and completed a FR program, was administered a battery of psychosocial assessments, including the PASS, at admission and discharge. Socioeconomic outcomes were collected 1 year after discharge. After identifying clinical ranges for mild, moderate, and severe pain anxiety, the three groups were compared on self-report measures of psychosocial distress, clinical diagnoses of psychosocial disorders, and 1-year socioeconomic outcomes. Correlations between the PASS and all measures of pain, anxiety, and disability were statistically significant. However, only the Pain Disability Questionnaire showed a large correlation coefficient (r > 0.5). Patients with the highest PASS scores were more likely to be diagnosed with a number of Axis I (depression, opioid dependence) or Axis II (Borderline Personality) psychiatric disorders. They were more likely to display treatment-seeking behavior at 1 year after discharge. However, the PASS failed to differentiate between any other 1-year outcomes. The PASS is elevated when other measures of psychosocial distress are also elevated. However, the PASS fails to discriminate between different indices of depression and anxiety and it is not highly related to 1-year outcomes in a CDOMD cohort. If time and resources are limited, a different measure of psychosocial distress that does relate to socioeconomic outcomes might be a better option in a CDOMD evaluation process.

Fibromyalgia Syndrome in Chronic Disabling Occupational Musculoskeletal Disorders

To identify the prevalence, risk factors, and treatment outcomes of patients with chronic disabling occupational musculoskeletal disorders (CDOMD) who met criteria for fibromyalgia. This was a prospective prognostic study of a consecutive cohort of CDOMD patients (n = 449) admitted for treatment. Patients were assessed for chronic widespread pain and fibromyalgia. The measures included demographic, injury-related and occupational information, psychosocial measures, and 1-year work status follow-up. The CDOMD patients with fibromyalgia reported higher-level psychosocial distress. Women with fibromyalgia were 9.6 times less likely to return to work 1-year posttreatment and, of those who did, were 4.3 times less likely to retain work. Of this cohort, 23.2% patients met criteria for fibromyalgia. Patients with fibromyalgia were found to show greater psychosocial distress and significantly poorer rates of work return and work retention 1-year postrehabilitation.

The Pain Disability Questionnaire: Relationship to One-Year Functional and Psychosocial Rehabilitation Outcomes

The Pain Disability Questionnaire (PDQ) is a new functional assessment instrument designed for evaluating chronic disabling musculoskeletal disorders. It is useful for assessing function/disability as affected by pain. This is the first study to assess the predictive validity of the PDQ in its relationship to 1-year post-treatment work- and health-related outcomes in a chronic disabling occupational musculoskeletal disorder (CDOMD) population. A prospective cohort of CDOMD patients (n=150) completed a prescribed functional restoration rehabilitation program, with PDQ and other psychosocial measures evaluated before and immediately after treatment. A structured telephonic interview for objective work- and health-related outcomes took place 1-year following treatment. Lower rates of work retention were associated with more severe pre-treatment PDQ scores. Higher post-treatment PDQ were associated with decreased return-to-work rates, decreased work retention and a greater percentage seeking health care from a new provider. In addition, PDQ scores were also associated with psychosocial measures such as depression and perceived pain intensity, as well as alternative measures of disability. Results demonstrated the ability of this simple and psychometrically-sound disability rating scale for systematic functional assessment in predicting treatment outcomes in patients with CDOMD. Results support the further use of the PDQ as a standard treatment outcomes measure in this area of musculoskeletal disorders.

Failure to Complete a Functional Restoration Program for Chronic Musculoskeletal Disorders: A Prospective 1-Year Outcome Study

Proctor TJ, Mayer TG, Theodore B, Gatchel RJ. Failure to complete a functional restoration program for chronic musculoskeletal disorders: a prospective 1-year outcome study. Objective To compare comprehensively the likelihood of various socioeconomically relevant outcomes between functional restoration completers and noncompleters, while simultaneously identifying risk factors for noncompletion. Design A prospective cohort study of patients with chronic disabling occupational musculoskeletal disorders (CDOMD). Setting Chronic pain management facility. Participants A total of 1440 patients with CDOMD were consecutively divided into 2 groups—one with 303 patients who did not complete the prescribed treatment program (noncompleters [NC]) and a second with 1137 patients who did (completers). Intervention The Interdisciplinary Functional Restoration: Rehabilitation program. Main Outcome Measures Validated questionnaires about pain, disability, and depression were added to results of a structured 1-year posttreatment telephone interview on socioeconomic outcomes covering work status, health utilization, recurrent injury claims, and resolution of financial disputes. Results The 1-year posttreatment socioeconomic outcomes were most striking. The NC group was 7 times more likely to have postrehabilitation surgery in the same area, and nearly 7 times more likely to have more than 30 visits to a new health provider in persistent health care-seeking efforts. The NC group also had only half the rates of work return and work retention, being 9.7 times less likely to have returned to any type of work, and 7 times less likely to have retained work at the end of the year. Regression analysis also revealed that work return, surgery in a compensable injured area, more health care utilization from a new provider, and more overall health care utilization (>30 visits) were most reliably predicted by whether the rehabilitation program was completed. Conclusions This large prospective study determined that noncompleters of interdisciplinary tertiary rehabilitation for CDOMDs had comparatively poor socioeconomic outcomes in the year after discharge from treatment, especially on work status and health utilization outcomes. These outcomes are of great relevance to societal, medical, and indemnity costs and future worker productivity. Several risk factors of possible importance in identifying potential noncompleters early in the treatment program were identified that may yield more effective interventions tailored to maintain compliance and decrease the percentage of drop-outs.