Variables4-150 | Univariate analysis† | Multivariate logistic regression analysis† | |||||
---|---|---|---|---|---|---|---|
OR | 95% CI | OR | 95% CI | ||||
Sex (male = 0, female = 1) | 1.0 | 0.6, 1.9 | |||||
Age (⩽55 = 0, >55 = 1) | 1.1 | 0.6, 2.2 | |||||
Ethnicity (white = 0, non-white = 1) | 1.0 | 0.4, 2.1 | |||||
Bilateral involvement (no = 0, yes = 1) | 2.2¶ | 1.2, 4.2 | 1.9 | 1.0, 3.7 | |||
Duration of complaints (⩽6 months = 0, >6 months = 1) | 1.9¶ | 1.0, 3.4 | 2.0 | 1.1, 3.7 | |||
Previous episode(s) of shoulder pain (no = 0, yes = 1) | 0.7¶ | 0.4, 1.2 | |||||
Neck pain present (no = 0, yes = 1) | 1.6¶ | 0.9, 2.9 | |||||
Normal activities possible (yes = 0, no = 1) | 1.0 | 0.6, 1.8 | |||||
Able to lie on the involved shoulder (yes = 0, no = 1) | 0.9 | 0.5, 1.6 | |||||
Waking up (no = 0, yes = 1) | 1.6¶ | 0.9, 3.0 | |||||
Cannot fall asleep (no = 0, yes = 1) | 1.5¶ | 0.8, 2.7 | |||||
Pain during rest (no = 0, yes = 1) | 1.2 | 0.7, 2.1 | |||||
Pain at night (VAS score ⩽76 = 0, >76 = 1)‡ | 1.8¶ | 0.9, 3.4 | |||||
Pain during the day (VAS score ⩽75 = 0, >75 = 1)‡ | 1.7¶ | 0.9, 3.2 | |||||
Functional status (score on SDQ ⩽87 = 0, >87 = 1) | 1.2 | 0.6, 2.3 | |||||
Severity of pain (VAS score ⩽72 = 0, >72 = 1)§ | 2.7¶ | 1.4, 5.2 | 2.7 | 1.3, 5.3 | |||
Depression (score on SAQ-N ⩽41 = 0, >41 = 1) | 1.6¶ | 0.8, 3.3 | |||||
Anxiety (score on SAQ-N ⩽47 = 0, >47 = 1) | 1.6¶ | 0.8, 3.3 | |||||
Anger (score on SAQ-N ⩽21 = 0, >21 = 1) | 1.7¶ | 0.9, 3.2 | |||||
Optimism (score on SAQ-N >27 = 0, ⩽27 = 1) | 0.8 | 0.4, 1.6 |
↵4-150 As the continuous variables were not linearly related to disagreement, the value of the 75th percentile was used to form dichotomised sub-groups. †The dependent variable was defined to be 0 if the observers agreed on the diagnosis, and 1 if they did not.‡Severity of pain assessed by the patient. §Severity of pain assessed by both examiners on a VAS. The 75th percentile of the mean score of both examiners was included in the analysis. ¶Variables with p<0.25 for the χ2 test were considered as candidates for multivariate logistic regression.