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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Pain. 2011 Feb 5;152(6):1256–1262. doi: 10.1016/j.pain.2011.01.005

Table 2.

Psychosocial problems attributed to opioids (Prescribed Opioids Difficulties Scale): Mean score1 and standard error of the mean comparing persons with pain-contingent versus time-scheduled opioid dosing among persons with chronic pain. Least square means adjusted for indicated variables.

Variables included in adjustment model A: Pain- contingent dosing only B: Time- scheduled dosing only p-value
1. Unadjusted (except for health plan) 4.2 (0.41) 5.4 (0.34) 0.04
2. Age, Gender, BMI, Education, Average Pain, Pain Days, Average Daily Opioid Dose, Predominant Use of Long-acting Opioids, number of days used opioids in past 2 weeks, number of times per day used opioids in prior two weeks 5.2 (0.46) 5.5 (0.36) 0.71
3. Same covariates as Model 2 plus Pain Impact Score, Charlson Comorbidity Score 5.2 (0.45) 5.8 (0.36) 0.33
4. Same covariates as Model 3 plus Depression (PHQ-8), self-reported history of a drug/alcohol problem 5.1 (0.43) 5.9 (0.35) 0.14
1

A higher score indicates that patients attributed more psychosocial problems to their use of opioid pain medications.