Table 4

 Mental component scores and individual scales from the SF-36v2 questionnaire by trial arm and follow-up period

OutcomeMean (standard deviation) score, sample sizeRegression analysis* (arm difference (95% CI), P)
Baseline6 weeks6 months6 weeks6 months
UCPDUCPDUCPD
Mental component
score
45.7 (13.3), 74346.1 (12.6), 150448.7 (12.2), 65348.7 (12), 133248.7 (11.8), 62949 (11.9), 1283−0.03 (−0.88 to 0.82), 0.940.11 (−0.83 to 1.05), 0.82
Physical functioning39.9 (10.2), 74339.3 (10.4), 150643.0 (10.8), 65643.0 (10.9), 133845.2 (10.8), 63244.7 (11.2), 12840.52 (−0.19 to 1.23), 0.140.00 (−0.75 to 0.75), 1.00
Role-physical37.4 (11.2), 74336.7 (10.9), 150243.2 (11.6), 65543.0 (11.3), 133645.5 (11.5), 63045.0 (11.5), 12840.27 (−0.60 to 1.15), 0.52−0.08 (−1.00 to 0.84), 0.86
Bodily pain34.9 (8.2), 74334.6 (8.2), 150641.1 (9.6), 65740.9 (9.9), 133843.2 (10.5), 63243.1 (10.6), 12840.06 (−0.68 to 0.80), 0.890.04 (−0.81 to 0.90), 0.93
General health45.1 (10.5), 74344.6 (10.7), 150645.9 (10.5), 65745.3 (10.8), 133846.1 (10.6), 63445.7 (11.1), 1284−0.07 (−0.66 to 0.51), 0.81−0.14 (−0.79 to 0.51), 0.66
Vitality43.7 (10.6), 74343.4 (10.7), 150646.3 (10.8), 65546.3 (10.8), 133447.4 (10.5), 63247.0 (11.1), 12830.35 (−0.40 to 1.11), 0.35−0.23 (−1.05 to 0.60), 0.59
Social functioning40.4 (12.8), 74339.8 (12.6), 150445.1 (12.2), 65745.0 (12.4), 133846.1 (12.0), 63246.2 (12.2), 12840.25 (−0.69 to 1.18), 0.580.34 (−0.61 to 1.30), 0.48
Role-emotional42.1 (14.6), 74342.3 (14.3), 149846.6 (12.7), 65546.2 (12.9), 133447.1 (12.2), 63047.1 (12.4), 1283−0.32 (−1.24 to 0.59), 0.51−0.06 (−1.07 to 0.95), 0.92
Mental health45.4 (11.7), 74345.8 (11.4), 150647.9 (11.4), 65548.2 (11.2), 133448.3 (11.44), 63248.7 (11.3), 12830.24 (−0.55 to 1.02), 0.570.18 (−0.67 to 1.04), 0.72

UC=usual care; PD=PhysioDirect.

*Adjusting for baseline outcome, age, sex, referral problem, and primary care trust.