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Table 5 Primary analysis of depression and disability outcomes in the intervention and control groups at 1 month and 2 months (Period 1)

From: Is supported self-management for depression effective for adults in community-based settings in Vietnam?: a modified stepped-wedge cluster randomized controlled trial

 

Period 1

Unadjusted mean

Adjusted difference (primary analysis)

p value

Adjusted difference (robustness checking)

p-value

Immediate intervention (n0 = 190)

Delayed intervention (n0 = 185)

    

Primary outcome

 SRQ-20 > 7 (%)

Baseline

100% (190/190)

100% (185/185)

1 month

57.1% (89/156)

71.2% (99/139)

OR = 0.47

95% CI (0.28, 0.78)

0.0038

OR = 0.39

95% CI (0.23, 0.64)

0.0002

2 month

26.4% (42/159)

42.3% (58/137)

OR = 0.42

95% CI (0.28, 0.63)

< 0.0001

OR = 0.33

95% CI (0.21, 0.52)

< 0.0001

Secondary outcomes

 SRQ-20

Baseline

11.0 (2.5)

10.7 (2.2)

1 month

8.4 (4.7)

9.9 (4.3)

Δ = − 1.76

95% CI (− 2.72, − 0.79)

0.0004

Δ = − 1.84

95% CI (− 2.81, − 0.86)

0.0002

2 month

5.2 (4.6)

7.5 (4.5)

Δ− 2.42

95% CI (− 3.38, − 1.40)

< 0.0001

Δ = − 2.50

95% CI (− 3.47, − 1.51)

< 0.0001

 WHODAS2.0

Baseline

26.9 (7.6)

26.7 (8.9)

1 month

22.9 (9.6)

24.5 (9.3)

Δ = − 1.86

95% CI (− 3.82, 0.06)

0.059

Δ = − 1.93

95% CI = (− 3.85, -0.02)

0.047

2 month

18.3 (7.4)

21.0 (8.3)

Δ = − 2.63

95% CI (− 4.32, − 0.99)

0.002

Δ = − 2.68

95% CI = (− 4.34, − 1.02)

0.0016

  1. Data are mean (n/N) for the binary primary outcome and mean (SD) for the continuous secondary outcomes, where n is the number of participants with SRQ-20 > 7 and N is the number of participants completing the outcome assessment and N is the same for all three outcomes in the study. The last two columns present results from robustness checking that additionally adjusted for the baseline covariates (gender, working status, living status and marital status)
  2. OR odds ratio, Δ mean difference