Characteristics of 152 study participants at entry to the study
| Characteristic | Control group (n=73) | Treatment group (n=79) | p |
|---|---|---|---|
| [n or mean (% or SD) or *median (IQR)] | |||
| Age (years) | 28.1 (6.1) | 25.2 (5.0) | 0.002 |
| BMI at booking-in (kg/m2)* | 24 (21–32)* | 28 (23–32)* | 0.06 |
| Smoker | 19 (26.0) | 24 (36.7) | 0.16 |
| Previous contraception used | |||
| Implanon® | 15 (20.6) | 33 (41.8) | 0.005 |
| COCP | 49 (67.1) | 59 (74.7) | 0.31 |
| Condoms | 29 (39.7) | 19 (24.1) | 0.04 |
| DMPA | 11 (15.1) | 11 (13.9) | 0.84 |
| LNG-IUS | 0 (–) | 2 (2.5) | 0.50 |
| POP | 3 (4.1) | 3 (3.8) | 1.00 |
| Previous unplanned pregnancy | 35 (49.3) | 50 (64.1) | 0.07 |
| Parity* | 2 (1–3)* | 2 (1–3)* | 0.96 |
| Gestation (days) | 273 (18.3) | 272 (21.0) | 0.70 |
| Caesarean delivery | 27 (37.0) | 27 (34.2) | 0.72 |
| Birth weight (g) | 3307.9 (657.3) | 3392.0 (689.9) | 0.44 |
| Fully breastfeeding | 42 (57.5) | 40 (50.6) | 0.49 |
| Partially breastfeeding | 4 (5.5) | 8 (10.1) | |
| Day postpartum Implanon inserted* | –* | 2 (0.99)* | – |
| PPH | 0.72 | ||
| No (less than 500 ml) | 58 (79.5) | 60 (75.9) | |
| 500–1000 ml | 11 (15.1) | 12 (15.2) | |
| >1000 ml | 4 (5.5) | 7 (8.9) | |
| Contraception used at follow-up | – | – | |
| COCP | 5 (6.8) | ||
| Condoms | 30 (41.1) | ||
| Nil/breastfeeding | 32 (43.8) | ||
| Tubal ligation (at Caesarean delivery) | 6 (8.2) | ||
*Data are median and IQR.
BMI, body mass index; COCP, combined oral contraceptive pill; DMPA, depot medroxyprogesterone acetate; IQR, interquartile range; LNG-IUS, levonorgestrel intrauterine system; POP, progestogen-only oral contraceptive pill; PPH, postpartum haemorrhage; SD, standard deviation.