Table 2: Participant demographics.
SD, standarddeviation. a) Student-t test, b) Fisher's exact tests.
| | Intervention | Control | P-value | | |
| | Mean | SD | Mean | SD | |
| Age (years) a) | | 0,33.4 | 05.3 | 031.5 | 05.5 | 0.22 |
| Work hours per day a) | Baseline | 9.3 | 01.7 | 008.7 | 01.3 | 0.21 |
| 1-week follow-up | 0,009.3 | 001.4 | 0009.2 | 002.8 | 0.82 |
| 1-month follow-up | 00,08.7 | 001.0 | 0008.3 | 001.1 | 0.17 |
| Gestational week at delivery a) | 0,039.0 | 001.2 | 0,038.8 | 001.2 | 0.56 | |
| Child’s birth weight (g) a) | 3,065.3 | 261.3 | 2,946.5 | 243.3 | 0.11 | |
| | n | 0% | n | 0% | |
| Family structure b) | Nuclear family | 18 | 75.0 | 19 | 79.2 | 1.00 |
| Extended family | 06 | 25.0 | 05 | 20.8 | |
| Work schedule b) | Day work | 22 | 91.7 | 20 | 83.3 | 0.67 |
| Shift work | 02 | 08.3 | 04 | 16.7 | |