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Table 5 Distribution of study outcomes at T2 and T3, by treatment group and effect estimates of primary and secondary outcomes (Intent to Treat Analysis)

From: A nurse-delivered, clinic-based intervention to address intimate partner violence among low-income women in Mexico City: findings from a cluster randomized controlled trial

  T2-T3 Comparison Treatment X Time interaction
  Treatment type Midline (T2)
N (%)
Endline (T3)
N (%)
OR (95% CI) p-value OR (95% CI) p-value
Physical and Sexual IPV (past month) Intervention 33/387
(8.5%)
29/365
(8.0%)
0.84 (0.49, 1.45) 0.53 0.55 (0.26, 1.13) 0.10
Control 60/393
(15.3%)
29/352
(8.2%)
0.50 (0.31, 0.83) <0.01*   
Physical IPV (past month) Intervention 138/386
(35.8%)
91/365
(24.9%)
0.59 (0.43, 0.82) <0.01* 0.82 (0.52, 1.28) 0.380
Control 173/393
(44.0%)
97/351
(27.6%)
0.48 (0.35, 0.66) <0.01*   
Sexual IPV (past month) Intervention 56/386
(14.5%)
43/365
(11.8%)
0.70 (0.44, 1.11) 0.12 0.81 (0.43, 1.53) 0.52
Control 70/393
(17.8%)
41/351
(11.7%)
0.62 (0.39, 0.98) 0.04*   
Reproductive Coercion (past month) Intervention 52/244
(21.3%)
31/225
(13.8%)
0.55 (0.32, 0.95) 0.03* 1.24 (0.59, 2.63) 0.57
Control 51/255
(20.0%)
33/217
(15.2%)
0.68 (0.40, 1.15) 0.16   
  Treatment type Midline (T2)
Mean (SD)
Endline (T3)
Mean (SD)
beta (95% CI) p-value beta (95% CI) p-value
Use of community resourcesa (past 3 mos) Intervention N = 387,
0.61 (1.22)
N = 365,
0.27 (0.87)
-0.33 (-0.45, -0.21) <0.01* -0.13 (-0.32, 0.05) 0.15
Control N = 393,
0.47 (1.18)
N = 351,
0.27 (0.77)
-0.21 (-0.35, -0.07) <0.01*   
Safety planning behaviorsa (past 3 mos) Intervention N = 387,
3.70 (3.11)
N = 365,
2.60 (2.85)
-1.08 (-1.38, -0.78) <0.01* -0.28 (-0.71, 0.16) 0.21
Control N = 393,
3.31 (3.03)
N = 351,
2.40 (2.64)
-0.83 (-1.15, -0.52) <0.01*   
Quality of Life (mental)a (past month) Intervention N = 386,
37.85 (8.30)
N = 363,
37.20 (7.69)
-0.50 (-1.48, 0.49) 0.32 -0.51 (-1.89, 0.88) 0.47
Control N = 392,
36.49 (7.63)
N = 350,
36.42 (7.65)
0.01 (-0.97, 1.00) 0.98   
  1. a Outcome variable is treated as a continuous variable, therefore regression coefficient beta and its 95% confidence interval are reported
  2. * Denotes significant finding
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