Table 1 The distribution of LBW determinants (total and LBW statistics)
From: Correlates of low birth weight in term pregnancies: a retrospective study from Iran
Total | LBW cases | |
|---|---|---|
Number (%) | Number (%) | |
Maternal age (at child birth) | (n = 3720) | (n = 182) |
≤20 | 631 (17.0) | 39 (21.4) |
21–34 | 2817 (75.7) | 129 (70.9) |
≥35 | 272 (7.3) | 14 (7.7) |
Mean (SD) | 25.7 (5.3) | 24.8 (5.6) |
Maternal education | (n = 3726) | (n = 181) |
Illiterate & primary | 1350 (36.2) | 64 (35.4) |
Secondary & high school | 2215 (59.5) | 115 (63.5) |
University | 161 (4.3) | 2 (1.1) |
Number of parities | (n = 3734) | (n = 175) |
none | 4 (0.1) | 1 (0.6) |
1 | 1666 (45.7) | 85 (48.6) |
2 | 1127 (31.0) | 49 (28.0) |
≥3 | 844 (23.2) | 40 (22.8) |
Mean (SD) | 1.91 (SD = 1.15) | 1.90 (1.21) |
History of LBW deliveries | (n = 3731) | (n = 182) |
No | 3578 (95.9) | 169 (92.9) |
Yes | 153 (4.1) | 13 (7.1) |
History of pre term labor | (n = 3722) | (n = 182) |
No | 3582 (96.2) | 173 (95.1) |
Yes | 140 (3.8) | 9 (4.9) |
Cigarette smoking | (n = 3731) | (n = 181) |
No | 3686 (98.8) | 174 (96.1) |
Yes | 45 (1.2) | 7 (3.9) |
Chronic diseases | (n = 3733) | (n = 182) |
None | 3380 (90.5) | 148 (81.3) |
Hypertension | 188 (5.0) | 22 (12.1) |
Others | 165 (4.5) | 12 (6.6) |
Residence | (n = 3716) | (n = 181) |
Tehran | 2504 (67.4) | 109 (60.2) |
Suburbs of Tehran | 1212 (32.6) | 72 (39.8) |