| Variables | Stressed women | Non-stressed women | |||||
| Total | n | % | n | % | P | ||
| Stress factors | |||||||
| Unplanned pregnancy | 380 | 221 | 58.15 | 159 | 41.9 | 0.33 | |
| Much-desired pregnancy | 119 | 76 | 63.9 | 43 | 36.1 | 0.07 | |
| Precioussness | 49 | 38 | 77.6 | 11 | 22.4 | 0.02 | |
| Previous prematuriy | 9 | 5 | 55.5 | 4 | 44.5 | 0.6 | |
| Relative’s illness | 102 | 68 | 66.7 | 34 | 33.3 | 0.006 | |
| Partner’s death | 10 | 9 | 90 | 1 | 10 | 0.02 | |
| Parent’s death | 156 | 108 | 69.2 | 48 | 30.8 | 0.000 | |
| Tension in couple | 157 | 102 | 65 | 55 | 35 | 0.003 | |
| Tension in family | 13 | 13 | 100 | 0 | 0 | 0.000 | |
| Obstetric risk factors | |||||||
| Maternal age < 18 | 39 | 21 | 53.8 | 18 | 46.2 | 0.4 | |
| Maternal age ≥ 35 | 190 | 110 | 57.9 | 80 | 42.1 | 0.2 | |
| Primiparity | 398 | 225 | 65.5 | 173 | 34.5 | 0.4 | |
| Parity ≥ 6 | 73 | 39 | 53.4 | 34 | 46.6 | 0.5 | |
| Spontaneous abortion ≥ 3 | 196 | 108 | 55.2 | 88 | 44.8 | 0.5 | |
| Previous stillbirth | 49 | 38 | 77.6 | 11 | 22.4 | 0.02 | |
| Previous prematurity | 9 | 5 | 55.5 | 4 | 45.5 | 0.6 | |
| Low socioeconomic status | 665 | 386 | 58 | 279 | 42 | 0.2 | |
| Illiterate and primary school | 204 | 139 | 68.1 | 65 | 31.9 | 0.000 | |
| Expectedly compensating factors | |||||||
| Married | 664 | 408 | 61.4 | 256 | 38.6 | 0.000 | |
| High socioeconomic level | 134 | 84 | 63.6 | 48 | 36.8 | 0.02 | |
| New charismatic religions | 429 | 429 | 59.3 | 294 | 36.1 | 0.02 | |