Table 2.
Maternal age and prenatal care of follow up and birth data for Low birth weight at University Clinical Center of Tuzla, Department for Gynecology and Obstetrics in the prewar (1988–1991), war (1992–1995), and postwar (1996–2009) period.
| Maternal characteristics-Maternal age (years) | Proportion (%) | Rate ratios (95% confidence interval) | |||||
|---|---|---|---|---|---|---|---|
| Prewar (n = 851) |
War (n = 1373) |
Postwar (n = 1864) |
Prewar | P | Postwar | P | |
| <20 | 163 (19.1%) | 275 (20%) | 326 (17.5%) | 1.057 (0.851–1.311) |
.614 | 1.181 (0.988–1.412) |
.06 |
| 20–24 | 259 (30.4%) | 332 (24.2%) | 660 (35.4%) | 0.72 (0.602–0.882) |
.001 | 0.679 (0.581–0.497) |
.0001 |
| 25–29 | 271 (31.8%) | 369 (26.8%) | 496 (26.6%) | 0.78 (0.652–0.948) |
.01 | 1.013 (0.866–1.186) |
.86 |
| ≥30 | 158 (18.6%) | 397 (28.9%) | 382 (20.5%) | 1.78 (1.448–2.197) |
.0001 | 1.578 (1.341–1.855) |
.0001 |
| Trimeste prenatal care | |||||||
| First trimester prenatal care | 446 (52.4%) | 109 (7.9%) | 631 (33.8%) | 0.07 (0.061–0.099) |
.0001 | 0.168 (0.135–0.209) |
.0001 |
| Second prenatal care | 264 (31%) | 317 (23.2%) | 720 (38.6%) | 0.667 (0.550–0.808) |
.0001 | 0.476 (0.407–0.557) |
.0001 |
| Third or No Prenatal care | 141 (16.6%) | 947 (68.9%) | 513 (27.6%) | 11,193 (0.038–13.862) |
.0001 | 5.854 (5.023–6.822) |
.0001 |
Rate ratios for an association between maternal age during pregnancy and low birth weight (LBW). CI = confidence interval. a Chi-squared test for linear trend used for comparison of proportions and linear-contrast analysis of variance used for comparison of means.