Lutz Günther

The course of depression and anxiety in patients undergoing disc surgery: A longitudinal observational study

OBJECTIVE This study examines longitudinal depression and anxiety rates in disc surgery patients in comparison to the general population, the change and associated determinants of depression and anxiety over time. METHODS The longitudinal observational study refers to 305 consecutive disc surgery patients (age range: 18-55 years). Depression and anxiety was assessed with the Hospital Anxiety and Depression Scale. Random effects regression models for unbalanced panel data were used. RESULTS Depression and anxiety decreases significantly during nine months after surgery. Depression rates vary between 23.6% (T0), 9.6% (T1) and 13.1% (T2). Only at T0 the depression rate differs significantly from the general population. Anxiety rates range between 23.7% (T0), 10.9% (T1) and 11.1% (T2). Compared to the general population anxiety rates are significantly higher at all three assessment points. Risk factors for anxiety or depression at the time of the surgery are psychiatric comorbidity before surgery, higher age, female gender, lower educational level, lower physical health status and higher pain intensity. Regarding depression and anxiety in the course of time significant time interactions were found for the existence of other chronic diseases, higher pain intensity and vocational dissatisfaction. CONCLUSIONS Compared to the general population patients undergoing herniated disc surgery are often affected by depression and anxiety during hospital treatment and also in the course of time. Multimodal diagnostics regarding psychological well-being, pain and physical health status may help to identify this risk group. The assistance by mental health professionals during hospital and rehabilitation treatment may reduce poor postoperative outcome.

Effects of psychiatric comorbidity on costs in patients undergoing disc surgery: a cross-sectional study

BACKGROUND CONTEXT Back pain presents a significant cause of health care costs and lost productivity. In most cases, conservative treatment will be sufficient, but in the most severe cases, disc surgery is indicated. PURPOSE To analyze the effect of psychiatric comorbidity on health care costs and lost productivity in patients with back pain undergoing disc surgery. STUDY DESIGN A cross-sectional study design was used. PATIENT SAMPLE A sample of 305 disc surgery patients (lumbar, 239; cervical, 66). OUTCOME MEASURES Patients were interviewed using the German version of the Composite International Diagnostic Interview to assess psychiatric comorbidity and a questionnaire to assess resource utilization and lost productivity for a 3-month period prior disc surgery. Health care resources were monetarily valued by unit costs, whereas productivity was valuated by labor costs. METHODS Cost differences between patients with and without psychiatric comorbidity were analyzed using bootstrap regression techniques. RESULTS Back pain was associated with mean 3-month direct health care costs ranging from €5,534 (lumbar disc herniation without psychiatric comorbidity) to €8,507 (cervical disc herniation with psychiatric comorbidity), of which between 51% and 79% were caused by disc surgery. Mean indirect costs ranged from €7,589 to €8,492. Psychiatric comorbidity was significantly associated with increased direct costs in lumbar disc herniation (€7,042 vs. €5,534). Regression analysis showed increments of €851 (p=.043) in direct costs and €1,636 (p=.058) in total costs for psychiatric comorbidity, which predominantly resulted from nonpsychiatric health care utilization. CONCLUSIONS Severe back pain is associated with high direct and indirect costs, which are influenced by the presence of psychiatric comorbidity. We found a lack of treatment for psychiatric comorbidity indicated by low mental health care utilization in affected individuals. More attention should be given to psychiatric comorbidity in the treatment of patients undergoing disc surgery. Clinicians should be aware of the high prevalence rates of psychiatric comorbidity in this patient group. They should consider the assessment of psychiatric distress and support of mental health professionals if applicable.

Psychiatric comorbidity as predictor of costs in back pain patients undergoing disc surgery: a longitudinal observational study

BackgroundPsychiatric comorbidity is common in back pain patients undergoing disc surgery and increases economic costs in many areas of health. The objective of this study was to analyse psychiatric comorbidity as predictor of direct and indirect costs in back pain patients undergoing disc surgery in a longitudinal study design.MethodsA sample of 531 back pain patients was interviewed after an initial disc surgery (T0), 3 months (T1) and 15 months (T2) using the Composite International Diagnostic Interview to assess psychiatric comorbidity and a modified version of the Client Sociodemographic and Service Receipt Inventory to assess resource utilization and lost productivity for a 3-month period prior interview. Health care utilization was monetarily valued by unit costs and productivity by labour costs. Costs were analysed using random coefficient models and bootstrap techniques.ResultsPsychiatric comorbidity was associated with significantly (p < 0.05) increased direct (+664 Euro) and indirect costs (+808 Euro) at T0. The direct cost difference predominantly resulted from medical health care utilization and was nearly unchanged at T2. Further important cost predictors were clinical variables like the presence of chronic medical disease, the number of previous disc surgeries, and time and gender.ConclusionPsychiatric comorbidity presents an important predictor of direct and indirect costs in back pain patients undergoing disc surgery, even if patients do not utilize mental health care. This effect seems to be stable over time. More attention should be given to psychiatric comorbidity and cost-effective treatments should be applied to treat psychiatric comorbidity in back pain patients undergoing disc surgery to reduce health care utilization and costs associated with psychiatric comorbidity.

Inpatient or outpatient rehabilitation after herniated disc surgery? - Setting-specific preferences, participation and outcome of rehabilitation.

Objective To examine rehabilitation preferences, participation and determinants for the choice of a certain rehabilitation setting (inpatient vs. outpatient) and setting-specific rehabilitation outcomes. Methods The longitudinal observational study referred to 534 consecutive disc surgery patients (18–55 years). Face-to-face baseline interviews took place about 3.6 days after disc surgery during acute hospital stay. 486 patients also participated in a follow-up interview via telephone three months later (dropout-rate: 9%). The following instruments were used: depression and anxiety (Hospital Anxiety and Depression Scale), pain intensity (numeric analog scale), health-related quality of life (Short Form 36 Health Survey), subjective prognosis of gainful employment (SPE-scale) as well as questions on rehabilitation attendance, return to work, and amount of sick leave days. Results The vast majority of patients undergoing surgery for a herniated disc attended a post-hospital rehabilitation treatment program (93%). Thereby two-thirds of these patients took part in an inpatient rehabilitation program (67.9%). Physical, psychological, vocational and health-related quality of life characteristics differed widely before as well as after rehabilitation depending on the setting. Inpatient rehabilitees were significantly older, reported more pain, worse physical quality of life, more anxiety and depression and a worse subjective prognosis of gainful employment before rehabilitation. Pre-rehabilitation differences remained significant after rehabilitation. More than half of the outpatient rehabilitees (56%) compared to only one third of the inpatient rehabilitees (33%) returned to work three months after disc surgery (p<.001). Conclusion The results suggest a “pre-selection” of patients with better health status in outpatient rehabilitation. Gaining better knowledge about setting-specific selection processes may help optimizing rehabilitation allocation procedures and improve rehabilitation effects such as return to work.

Risk Factors for Postoperative Pain Intensity in Patients Undergoing Lumbar Disc Surgery: A Systematic Review

Objectives Pain relief has been shown to be the most frequently reported goal by patients undergoing lumbar disc surgery. There is a lack of systematic research investigating the course of postsurgical pain intensity and factors associated with postsurgical pain. This systematic review focuses on pain, the most prevalent symptom of a herniated disc as the primary outcome parameter. The aims of this review were (1) to examine how pain intensity changes over time in patients undergoing surgery for a lumbar herniated disc and (2) to identify socio-demographic, medical, occupational and psychological factors associated with pain intensity. Methods Selection criteria were developed and search terms defined. The initial literature search was conducted in April 2015 and involved the following databases: Web of Science, Pubmed, PsycInfo and Pubpsych. The course of pain intensity and associated factors were analysed over the short-term (≤ 3 months after surgery), medium-term (> 3 months and < 12 months after surgery) and long-term (≥ 12 months after surgery). Results From 371 abstracts, 85 full-text articles were reviewed, of which 21 studies were included. Visual analogue scales indicated that surgery helped the majority of patients experience significantly less pain. Recovery from disc surgery mainly occurred within the short-term period and later changes of pain intensity were minor. Postsurgical back and leg pain was predominantly associated with depression and disability. Preliminary positive evidence was found for somatization and mental well-being. Conclusions Patients scheduled for lumbar disc surgery should be selected carefully and need to be treated in a multimodal setting including psychological support.

The Course of Pain Intensity in Patients Undergoing Herniated Disc Surgery: A 5-Year Longitudinal Observational Study.

Objectives The aims of this study are to answer the following questions (1) How does the pain intensity of lumbar and cervical disc surgery patients change within a postoperative time frame of 5 years? (2) Which sociodemographic, medical, work-related, and psychological factors are associated with postoperative pain in lumbar and cervical disc surgery patients? Methods The baseline survey (T0; n = 534) was conducted 3.6 days (SD 2.48) post-surgery in the form of face-to-face interviews. The follow-up interviews were conducted 3 months (T1; n = 486 patients), 9 months (T2; n = 457), 15 months (T3; n = 438), and 5 years (T4; n = 404) post-surgery. Pain intensity was measured on a numeric rating-scale (NRS 0–100). Estimated changes to and influences on postoperative pain by random effects were accounted by regression models. Results Average pain decreased continuously over time in patients with lumbar herniated disc (Wald Chi² = 25.97, p<0.001). In patients with cervical herniated disc a reduction of pain was observed, albeit not significant (Chi² = 7.02, p = 0.135). Two predictors were associated with postoperative pain in lumbar and cervical disc surgery patients: the subjective prognosis of gainful employment (p<0.001) and depression (p<0.001). Conclusion In the majority of disc surgery patients, a long-term reduction of pain was observed. Cervical surgery patients seemed to benefit less from surgery than the lumbar surgery patients. A negative subjective prognosis of gainful employment and stronger depressive symptoms were associated with postoperative pain. The findings may promote multimodal rehabilitation concepts including psychological and work-related support.

Choosing the right rehabilitation setting after herniated disc surgery: Motives, motivations and expectations from the patients’ perspective

Objectives This study aims to investigate (1) motives, motivations and expectations regarding the choice for a specific rehabilitation setting after herniated disc surgery and (2) how rehabilitation-related motivations and expectations are associated with rehabilitation outcome (ability to work, health-related quality of life and satisfaction with rehabilitation) three months after disc surgery. Methods The longitudinal cohort study refers to 452 disc surgery patients participating in a subsequent rehabilitation. Baseline interviews took part during acute hospital stay (pre-rehabilitation), follow-up interviews three months later (post-rehabilitation). Binary logistic regression and multiple linear regression analyses were applied. Results (1) Motives, motivations and expectations: Inpatient rehabilitation (IPR) patients stated “less effort/stress” (40.9%), more “relaxation and recreation” (39.1%) and greater “intensity of care and treatment” (37.0%) regarding their setting preference, whereas outpatient rehabilitation (OPR) patients indicated “family reasons” (45.3%), the wish for “staying in familiar environment” (35.9%) as well as “job-related reasons” (11.7%) as most relevant. IPR patients showed significantly higher motivation/expectation scores regarding regeneration (p < .001), health (p < .05), coping (p < .001), retirement/job (p < .01), psychological burden (p < .05) and physical burden (p < .001) compared to OPR patients. (2) Associations with rehabilitation outcome: Besides other factors (e.g. age, gender and educational level) rehabilitation-related motivations/expectations were significantly associated with rehabilitation outcome measures. For example, patients with less motivations/expectations to achieve improvements regarding “physical burden” showed a better health-related quality of life (p < .01) three months after disc surgery. Less motivations/expectations to achieve improvements regarding “psychological burden” was linked to a better mental health status (p < .001) and a greater satisfaction with rehabilitation (OR = .806; p < .05). Conclusion Rehabilitation-related motivations and expectations differed substantially between IPR and OPR patients before rehabilitation and were significantly associated with rehabilitation outcome. Taking motivational and expectation-related aspects into account may help to improve allocation procedures for different rehabilitation settings and may improve rehabilitation success.