Table 1 Characteristics of study subjects
From: Opium use during pregnancy and infant size at birth: a cohort study
Unexposed a | Opium user | |||
|---|---|---|---|---|
All | Opium user only | Tobacco and Opium user | ||
N (%) | N (%) | N (%) | N (%) | |
Maternal age (Years) | ||||
≤ 19 | 134 (14.8) | 49 (5.5) | 40 (5.9) | 9 (4.3) |
20–24 | 250 (27.6) | 161 (18.2) | 133 (19.6) | 28 (13.3) |
25–29 | 260 (28.7) | 278 (31.3) | 210 (31.0) | 68 (32.4) |
30–34 | 187 (20.7) | 251 (28.3) | 181 (26.7) | 70 (33.3) |
≥ 35 | 68 (7.5) | 143 (16.1) | 108 (16.0) | 35 (16.7) |
Missing | 6 (0.7) | 5 (0.6) | 5 (0.7) | 0 (0) |
Parity | ||||
Nulliparous | 372 (41.1) | 199 (22.4) | 155 (22.9) | 44 (21.0) |
Parous | 533 (58.9) | 688 (77.6) | 522 (77.1) | 169 (79.0) |
Maternal height (cm) | ||||
≤ 149 | 68 (7.5) | 66 (7.4) | 47 (6.9) | 19 (9.0) |
150–155 | 198 (21.9) | 193 (21.8) | 152 (22.5) | 41 (19.5) |
156–160 | 380 (42.0) | 399 (45.0) | 295 (43.6) | 104 (49.5) |
161–164 | 120 (13.3) | 109 (12.3) | 84 (12.4) | 25 (11.9) |
≥ 165 | 100 (11.0) | 103 (11.6) | 86 (12.7) | 17 (8.1) |
Missing | 39 (4.3) | 18 (2.0) | 13 (1.9) | 4 (1.9) |
Maternal body mass index | ||||
< 18.5 | 63 (7.0) | 52 (5.9) | 34 (5.0) | 18 (8.6) |
18.5 to < 25 | 439 (48.5) | 474 (53.4) | 356 (52.6) | 118 (56.2) |
25 to < 30 | 245 (27.1) | 231 (26.0) | 184 (27.2) | 47 (22.4) |
30 to < 35 | 91 (10.1) | 91 (10.3) | 72 (10.6) | 19 (9.0) |
≥ 35 | 28 (3.1) | 21 (2.4) | 18 (2.7) | 3 (1.4) |
Missing | 39 (4.3) | 17 (1.9) | 13 (1.9) | 5 (2.4) |
Husband’s occupation | ||||
Unemployed | 25 (2.8) | 56 (6.3) | 37 (5.5) | 19 (9.0) |
Non skill worker | 400 (44.2) | 419 (47.2) | 312 (46.1) | 107 (51.0) |
Skill worker | 91 (10.1) | 70 (7.9) | 58 (8.6) | 12 (5.7) |
Self-employed | 111 (12.3) | 101 (11.4) | 89 (13.1) | 12 (5.7) |
Farmer | 179 (19.8) | 163 (18.4) | 123 (18.2) | 40 (19.0) |
Other | 95 (10.5) | 69 (7.8) | 52 (7.7) | 17 (78.1) |
Missing | 4 (0.4) | 9 (1.0) | 6 (0.9) | 3 (1.4) |
Unemployed | 25 (2.8) | 56 (6.3) | 37 (5.5) | 19 (9.0) |
Preterm delivery | ||||
Term | 850 (93.9) | 798 (90.0) | 616 (91.0) | 182 (86.7) |
Preterm | 55 (6.1) | 89 (10.0) | 61 (9.0) | 28 (13.3) |
Infant sex | ||||
Female | 447 (49.4) | 436 (49.2) | 337 (49.8) | 99 (47.1) |
Male | 443 (49.0) | 441 (49.7) | 331 (48.9) | 110 (52.4) |
Missing | 15 (1.7) | 10 (1.1) | 9 (1.3) | 1 (0.5) |
Birth weight (gr) | ||||
≤ 2500 | 43 (4.8) | 99 (11.2) | 75 (11.1) | 24 (11.4) |
2500–2999 | 139 (15.4) | 179 (20.2) | 134 (19.8) | 45 (21.4) |
3000–3299 | 205 (22.7) | 203 (22.9) | 143 (21.1) | 60 (28.6) |
3300–3599 | 269 (29.7) | 193 (21.8) | 154 (22.7) | 39 (18.6) |
≥ 3600 | 234 (25.9) | 203 (22.9) | 162 (23.9) | 41 (19.5) |
Missing | 15 (1.7) | 10 (1.1) | 9 (1.3) | 1 (0.5) |
Birth length (cm) | ||||
≤ 46 | 59 (6.5) | 115 (13.0) | 87 (12.9) | 28 (13.3) |
47–48 | 149 (16.5) | 138 (15.6) | 103 (15.2) | 35 (16.7) |
49–51 | 535 (59.1) | 480 (54.1) | 359 (53.0) | 121 (57.6) |
≥ 52 | 147 (16.2) | 144 (16.2) | 119 (17.6) | 25 (11.9) |
Missing | 15 (1.7) | 10 (1.1) | 9 (1.3) | 1 (0.5) |
Head circumference (cm) | ||||
≤ 32 | 56 (6.2) | 119 (13.4) | 88 (13.0) | 31 (14.8) |
33–34 | 242 (16.7) | 337 (38.0) | 252 (37.2) | 85 (40..5) |
35–36 | 476 (52.6) | 362 (40.8) | 281 (41.5) | 81 (38.6) |
≥ 37 | 116 (12.8) | 59 (6.7) | 47 (6.9) | 12 (5.7) |
Missing | 15 (1.7) | 10 (1.1) | 9 (1.3) | 1 (0.5) |