Table 5

Overall, mild and moderate sample. Changes in the EQ-5D within and between the intervention and usual care group with missing data replaced using last value carried forward
Usual care group (n=112) Intervention group (n=119) Difference (95% CI) between groups (intervention group -usual care group)**
Sample Months mean (SD) Difference*(95% CI) SRM# mean (SD) Difference*(95% CI) SRM# Difference P-value SES$
Pre-intervention 53.25 (17.63) 50.76 (18.73)
3 (Post-intervention) 55.54 (16.36) 2.29 (4.6 to −0.01) 0.19 59.7 (18.1) 8.97(12.20 to 5.72) 0.50 4.19 (−0.31 to 8.66) 0.067 0.26
Overall 6 57.05 (16.97) 3.80 (6.98 to 0.61) 0.22 57.9 (20.7) 7.09 (10.78 to 3.39) 0.34 0.81 (−4.12 to 5.73) 0.748 0.05
9 57.69 (17.35) 4.44 (8.0 to 0.87) 0.23 59.2 (20.8) 8.46 (11.99 to 4.93) 0.43 1.54 (−3.43 to 6.51) 0.543 0.09
Usual care group (n=48) Intervention group (n=37)
Pre-intervention 57.92 (18.10) 57.81 (17.58)
Mild 3 (Post-intervention) 60.71 (16.00) 2.79 (6.17 to −0.59) 0.24 65.7 (16.7) 7.89(13.84 to 1.94) 0.44 4.99 (−2.11 to 12.09) 0.166 0.31
6 60.90 (16.49) 2.98 (7.71 to −1.75) 0.18 64 (18.1) 6.14 (12.73 to −0.47) 0.31 3.05 (−4.43 to 10.53) 0.420 0.18
9 62.52 (15.02) 4.60(9.75 to −0.54) 0.25 67.8 (20.5) 9.97 (16.82 to 3.11) 0.48 5.26 (−2.39 to 12.92) 0.175 0.35
Usual care group (n=64) Intervention group (n=82)
Pre-intervention 49.75 (16.56) 47.59 (18.46)
3 (Post-intervention) 51.67 (15.67) 1.92 (5.15 to −1.31) 0.15 57.04 (18.08) 9.45(13.39 to 5.50) 0.52 5.36 (−0.263 to 10.99) 0.062 0.34
Moderate 6 54.17 (16.88) 4.42 (8.82 to 0.02) 0.25 55.11 (21.35) 7.52 (12.07 to 2.97) 0.36 0.93 (−5.49 to 7.37) 0.774 0.06
9 54.06 (18.20) 4.31 (89.33 to −0.70) 0.21 55.37 (19.83) 7.78 (11.95 to 3.60) 0.40 1.30 (−5.00 to 7.61) 0.684 0.07

Abbreviations: SD standard deviation. CI confidence interval.

* Differences were calculated between follow-up measurement and baseline measurement.

Positive differences indicate improvement; a negative one denotes some worsening on clinical measures.

# SRM: Standardized response mean. Calculated as the mean change in score divided by the standard deviation of the change in score.

$ SES: Standardized effect size was computed as the mean difference between intervention and control group divided by the standard deviation of the control measurement.

A positive SRM denotes improvement; a negative one denotes some worsening on clinical measures.

** Difference was calculated between intervention group and control group.

Positive differences indicate improvement in the intervention group. Negative differences denote worsening in the intervention group.

Interpretation effect sizes: Values 0.2-0.5 represent small changes, 0.5-0.8 moderate changes and >0.8 large changes.

Casañas et al.

Casañas et al. BMC Psychiatry 2012 12:230   doi:10.1186/1471-244X-12-230

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