Table 4

Survey outcomes for sampled participants by phase

Survey outcomeIntervention phaseControl phaseAdjusted comparison*†‡
Mean (SD)(n)Mean (SD)(n)Δ(95%CI)P values
SF12 mental health component: all43.77 (9.67)(1410)44.62 (9.47)(662)−0.720(−1.469 to 0.030)0.060
Risk group 149.44 (8.34)(242)49.03 (8.07)(83)1.736(0.106 to 3.366)0.037
Risk group 243.72 (8.97)(381)45.18 (8.85)(163)−0.802(−2.222 to 0.618)0.268
Risk group 342.54 (9.53)(659)44.13 (9.80)(322)−1.187(−2.317 to -0.056)0.040
Risk group 439.61 (10.35)(127)41.45 (9.10)(94)−1.911(−4.079 to 0.258)0.084
SF12 physical health component: all41.72 (9.20)40.07 (7.30)1.465(0.774 to 2.157)<0.001
Risk group 134.41 (9.09)36.77 (7.62)−4.385(−6.106 to -2.664)<0.001
Risk group 241.90 (8.18)40.65 (7.12)0.882(−0.345 to 2.108)0.159
Risk Group 343.54 (8.45)40.18 (7.15)3.205(2.218 to 4.191)<0.001
Risk group 445.56 (8.76)41.61 (7.11)4.103(2.230 to 5.977)0.035
SF6D score: all0.638 (0.068)(1467)0.638 (0.072)(692)−0.0002(−0.008 to 0.004)0.584
Risk group 10.629 (0.069)(247)0.642 (0.077)(83)-0.019(−0.034 to -0.003)<0.001
Risk group 20.639 (0.072)(399)0.641 (0.075)(166)−0.003(−0.015 to 0.010)0.649
Risk group 30.641 (0.067)(690)0.638 (0.070)(341)0.002(−0.006 to 0.010)0.628
Risk group 40.635 (0.060)(130)0.633 (0.069)(102)0.002(−0.013 to 0.017)0.787
QCM score: all4.20 (0.74)(1408)4.27 (0.70)(660)−0.074(−0.133 to -0.015)0.014
Risk group 14.19 (0.72)(189)3.96 (0.86)(62)0.169(−0.030 to 0.368)0.095
Risk group 24.24 (0.69)(391)4.28 (0.72)(162)−0.080(−0.191 to 0.031)0.156
Risk group 34.20 (0.74)(697)4.36 (0.61)(340)−0.107(−0.186 to -0.029)0.008
Risk group 44.04 (0.87)(130)4.13 (0.76)(96)−0.100(−0.286 to 0.086)0.291
  • *online supplementary table 2 shows significant covariates and factors.

  • †Covariates considered were: phase; gender; age; PRISM score; WIMD score; WIMD health component on or near 1 February 2013) and seasonality and trend scores for phases.

  • ‡The comparison between phases is summarised as an additive phase effect Δ in the same units as the dependent variable, estimated from mixed linear models.

  • PRISM, predictive risk stratification model; QCM, quality of care monitor; WIMD, Welsh Index of Multiple Deprivation.