Associations between ideal interpregnancy interval (IPI), breastfeeding, contraception use, and IPI education with IPI following a live birth
| Parameter | IPI <12 months (%) | IPI ≥12 months (%) | Total | X2 |
| Ideal IPI | ||||
| <6 months | 0 | 0 | 0 | p=0.030 |
| 6–12 months | 5 (7.5) | 3 (1.1) | 8 | |
| 1–2 years | 20 (29.9) | 81 (30.0) | 101 | |
| 2–3 years | 11 (16.4) | 78 (28.9) | 89 | |
| >3 years | 4 (6.0) | 25 (9.3) | 29 | |
| Don’t know | 27 (40.3) | 83 (30.7) | 110 | |
| Total | 67 (100.0) | 270 (100.0) | 337 | |
| Breastfeeding* | ||||
| No feeding | 13 (18.3) | 44 (16.1) | 57 | p=0.041 |
| <6 months | 23 (32.4) | 74 (27.1) | 97 | |
| 6–12 months | 22 (31.0) | 58 (21.2) | 80 | |
| 12+ months | 13 (18.3) | 97 (35.5) | 110 | |
| Total | 71 (100.0) | 273 (100.0) | 344 | |
| Use of contraception† | ||||
| None | 49 (71.0) | 103 (39.2) | 152 | p<0.001 |
| Short-acting reversible methods | 18 (26.1) | 131 (49.8) | 149 | |
| Long-acting reversible methods | 2 (2.9) | 29 (11.0) | 31 | |
| Total | 69 (100.0) | 263 (100.0) | 332 | |
| Received advice about IPI | ||||
| No | 36 (50.7) | 153 (56) | 189 | p=0.580 |
| Yes | 33 (46.5) | 116 (42.5) | 149 | |
| Don’t know | 2 (2.8) | 4 (1.5) | 6 | |
| Total | 71 (100.0) | 273 (100.0) | 344 |
*Both partial and exclusive breastfeeding.
†Missing data not included (n=12).
IPI, interpregnancy interval.