Table 1 comparison of the variables between the cases and controls
From: Folic acid level and preterm birth among Sudanese women
| Variables | The cases (n = 56) | The controls (n = 56) | P |
|---|---|---|---|
| The mean (SD)of | |||
| Age, year | 28.3 (6.2) | 28.3 (5.9) | 0.996 |
| Parity | 2.6 (2.7) | 2.1 (1.7) | 0.243 |
| Body mass index, kg/m2 | 26.2(4.3) | 26.4 (4.0) | 0.825 |
| Interpregnancy interval, month | 24.4(18.7) | 14.9 (10.2) | 0.004 |
| Hemoglobin, g/dl | 10.0 (0.9) | 10.2 (1.0) | 0.229 |
| Number (percentage)of | |||
| Education < secondary level | 39 (69.6) | 29 (51.8) | 0.051 |
| Housewives | 51 (91.1) | 48 (85.7) | 0.278 |
| History of miscarriage | 15 (26.8) | 20 (35.7) | 0.208 |
| Lack of antenatal care | 10 (18.2) | 6 (10.9) | 0.209 |