Table 2 Distribution of characteristics of pregnancies and newborns included in the study
From: Influence of maternal and social factors as predictors of low birth weight in Italy
Weight < 2500 | Weight ≥ 2500 (400) | |||||||
|---|---|---|---|---|---|---|---|---|
Pre-term (125) | Term (75) | Total (200) | ||||||
No | % | No | % | No | % | No | % | |
Number of prenatal care visits | ||||||||
0 | 0 | -- | 1 | 1.5 | 1 | 0.5 | 1 | 0.3 |
1 – 4 | 98 | 81.7 | 57 | 82.6 | 155 | 82 | 275 | 69.4 |
> 4 | 22 | 18.3 | 11 | 15.9 | 33 | 17.5 | 120 | 30.3 |
Fisher's exact, p = 0.511 | Fisher's exact, p = 0.001 | |||||||
Number of echographies | ||||||||
0 – 2 | 3 | 2.5 | 3 | 4.5 | 6 | 3.2 | 3 | 0.7 |
3 | 2 | 1.7 | 6 | 9 | 8 | 4.3 | 9 | 2.3 |
> 3 | 115 | 95.8 | 58 | 86.5 | 173 | 92.5 | 384 | 97 |
Fisher's exact, p = 0.028 | Fisher's exact, p = 0.028 | |||||||
Amniocentesis/Villicentesis | ||||||||
No | 111 | 92.5 | 62 | 89.9 | 173 | 91.5 | 343 | 86.6 |
Yes | 9 | 7.5 | 7 | 10.1 | 16 | 8.5 | 53 | 13.4 |
χ2 = 0.40, 1 df, p = 0.529 | χ2 = 2.97, 1 df, p = 0.085 | |||||||
Type of delivery | ||||||||
Eutocic | 34 | 28.6 | 36 | 51.4 | 70 | 37 | 256 | 65.3 |
Caesarean | 85 | 71.4 | 34 | 48.6 | 119 | 63 | 136 | 34.7 |
χ2 = 9.87, 1 df, p = 0.002 | χ2 = 41.38, 1 df, p < 0.0001 | |||||||
Course of the pregnancy | ||||||||
Physiological | 75 | 62.5 | 60 | 87 | 135 | 71.4 | 377 | 95.2 |
Pathological | 45 | 37.5 | 9 | 13 | 54 | 28.6 | 19 | 4.8 |
χ2 = 12.84, 1 df, p < 0.0001 | χ2 = 66.2, 1 df, p < 0.0001 | |||||||
Growth defect | ||||||||
No | 93 | 77.5 | 55 | 79.7 | 148 | 78.3 | 391 | 98.7 |
Yes | 27 | 22.5 | 14 | 20.3 | 41 | 21.7 | 5 | 1.3 |
χ2 = 0.12, 1 df, p = 0.723 | Fisher's exact, p < 0.0001 | |||||||
Number of fetuses | ||||||||
Single | 84 | 70 | 52 | 74.3 | 136 | 71.6 | 387 | 98 |
Multiple | 36 | 30 | 18 | 25.7 | 54 | 29.4 | 8 | 2 |
χ2 = 0.40, 1 df, p = 0.528 | χ2 = 94.33, 1 df, p < 0.0001 | |||||||
Newborn sex | ||||||||
Male | 48 | 40 | 35 | 50 | 83 | 43.7 | 209 | 52.8 |
Female | 72 | 60 | 35 | 50 | 107 | 56.3 | 187 | 47.2 |
χ2 = 1.79, 1 df, p = 0.180 | χ2 = 4.25, 1 df, p = 0.039 | |||||||
Birth's order | ||||||||
1 | 83 | 69.2 | 47 | 67.1 | 130 | 68.4 | 206 | 52 |
2 | 22 | 18.3 | 16 | 22.9 | 38 | 20 | 141 | 35.6 |
≥ 3 | 15 | 12.5 | 7 | 10 | 22 | 11.6 | 49 | 12.4 |
χ2 = 0.001, 1 df, p = 0.963 | χ2 = 8.01, 1 df, p = 0.006 | |||||||
Apgar score | ||||||||
1 – 3 | 5 | 4.4 | 1 | 1.5 | 6 | 3.3 | 0 | -- |
4 – 6 | 15 | 13.1 | 0 | -- | 15 | 8.2 | 7 | 1.8 |
≥ 7 | 94 | 82.5 | 67 | 98.5 | 161 | 88.5 | 384 | 98.2 |
Fisher's exact, p = 0.001 | Fisher's exact, p < 0.0001 | |||||||
Intensive care need | ||||||||
No | 89 | 75.4 | 68 | 98.6 | 157 | 84 | 389 | 99.2 |
Yes | 29 | 24.6 | 1 | 1.4 | 30 | 16 | 3 | 0.8 |
Fisher's exact, p < 0.0001 | Fisher's exact, p < 0.0001 | |||||||