Table 3.
Prevalence of anemia according to obstetrical characteristics.
| Variable | Hb level (mg/dl) | Anemia | Total | P value | |
|---|---|---|---|---|---|
| Mean (SD) | No | Yes | |||
| Ferrus sulphate intake in this pregnancy | 0.002 | ||||
| Yes | 11.2 (1.2) | 241 (60.4) | 158 (39.6) | 399 | |
| No | 11.6 (1) | 261 (71.8) | 85 (28.2) | 301 | |
| Gravidity | 0.618 | ||||
| One | 11.4 (1.2) | 115 (68.9) | 52 (31.1) | 167 | |
| Two | 11.1 (1) | 75 (60) | 50 (40) | 125 | |
| Three | 11.4 (1.1) | 69 (63.9) | 39 (36.1) | 108 | |
| Four | 11.5 (1.1) | 59 (66.3) | 30 (33.7) | 89 | |
| ≥five | 11.4 (1.2) | 139 (65.9) | 72 (34.1) | 211 | |
| Parity | 0.713 | ||||
| Zero | 11.4 (1.2) | 130 (68.4) | 60 (31.6) | 190 | |
| One | 11.3 (1.1) | 85 (61.2) | 54 (38.8) | 139 | |
| Two | 11.4 (1.1) | 81 (66.4) | 41 (33.6) | 122 | |
| Three | 11.4 (1.1) | 57 (65.5) | 30 (34.5) | 87 | |
| ≥four | 11.3 (1.2) | 104 (64.5) | 58 (35.5) | 162 | |
| Previous cesarean section | 0.461 | ||||
| Yes | 11.5 (1.3) | 71 (62.3) | 43 (37.7) | 114 | |
| No | 11.3 (1.1) | 386 (65.9) | 200 (34.1) | 586 | |
| Trimester | <0.005 | ||||
| 1st | 12 (1.1) | 116 (81.1) | 27 (18.9) | 143 | |
| 2nd | 11.4 (1) | 142 (67.3) | 69 (32.7) | 211 | |
| 3rd | 11.1 (1.2) | 199 (57.5) | 147 (42.5) | 346 | |
| Interpregnancy interval/months | 0.769 | ||||
| 1st pregnancy | 11.4 (1.2) | 118 (67.4) | 57 (32.6) | 175 | |
| <12 | 11.4 (1.2) | 93 (67.4) | 45 (32.6) | 138 | |
| 12–23.9 | 11.4 (1.2) | 102 (63.4) | 59 (36.6) | 161 | |
| ≥24 | 11.3 (1) | 144 (63.7) | 82 (36.3) | 226 | |
| Body mass index (kg/m²) | 0.372 | ||||
| Underweight (<19.8) | 11.3 (1.6) | 8 (50) | 8 (50) | 16 | |
| Normal (19.8–26) | 11.3 (1.2) | 154 (63.4) | 89 (36.6) | 243 | |
| Overweight (26–29) | 11.4 (1.1) | 108 (64.7) | 59 (35.3) | 167 | |
| Obese (>29) | 11.4 (1.1) | 187 (68.2) | 87 (31.8) | 274 | |