From: Interventions to reduce postpartum stress in first-time mothers: a randomized-controlled trial
 | All arms | Video | Hotline | Both | Control |     P-Value |
---|---|---|---|---|---|---|
 | (N = 452) | (N = 127) | (N = 121) | (N = 101) | (N = 103) |  |
Mother had physical health problem |  |  |  |  |  |   0.594 |
 Yes | 18.4 | 17.5 | 21.5 | 19.8 | 14.7 |  |
 No | 81.6 | 82.5 | 78.5 | 80.2 | 85.3 |  |
Smoking |  |  |  |  |  |   0.706 |
 Never | 64.8 | 69.1 | 62.8 | 63.6 | 63.1 |  |
 Ever | 35.2 | 30.9 | 37.2 | 36.4 | 36.9 |  |
Breast feeding |  |  |  |  |  |   0.498 |
 Exclusive | 27.4 | 27.6 | 33.9 | 27.7 | 19.4 |  |
 With formula milk | 39.6 | 40.2 | 38.0 | 36.6 | 43.7 |  |
 Only formula milk | 33.0 | 32.3 | 28.1 | 35.6 | 36.9 |  |
Baby had health problem |  |  |  |  |  |   0.498 |
 Yes | 28.8 | 26.0 | 33.1 | 30.7 | 25.2 |  |
 No | 71.2 | 74.0 | 66.9 | 69.3 | 74.8 |  |
Infant’s behavior |  |  |  |  |  |   0.578 |
 Easy to normal | 67.0 | 67.7 | 66.9 | 71.3 | 62.1 |  |
 Fussy | 33.0 | 32.3 | 33.1 | 28.7 | 37.9 |  |
Marital relationship |  |  |  |  |  |   0.203 |
 Satisfactory | 58.3 | 58.7 | 58.3 | 65.3 | 50.5 |  |
 Unsatisfactory | 41.7 | 41.3 | 41.7 | 34.7 | 49.5 |  |
Received social support |  |  |  |  |  |   0.20 |
 Adequate | 65.9 | 61.1 | 69.7 | 72.0 | 61.4 |  |
 Not adequate | 34.1 | 38.9 | 30.3 | 28.0 | 38.6 |  |
Major life event |  |  |  |  |  |   0.330 |
 Yes | 16.6 | 15.7 | 17.4 | 11.9 | 21.4 |  |
 No | 83.4 | 84.3 | 82.6 | 88.1 | 78.6 |  |