Characteristics of all women with live births and the subsample of women with live births in their first pregnancy included in the analysis of recurrent preterm births in Matlab, Bangladesh from 1990 to 2019
| Characteristics | All live births (n=72 160) | Sub-sample of women with live births in first pregnancy (n=14 567) | ||||
| Preterm | Term | Total | Preterm | Term | Total | |
| Maternal age (year) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) |
| <20 | 2401 (18.2) | 11 485 (19.5) | 13 886 (19.2) | 1329 (52.8) | 5763 (47.8) | 7092 (48.7) |
| 20–24 | 4050 (30.7) | 19 496 (33.0) | 23 546 (32.6) | 988 (39.3) | 5133 (42.6) | 6121 (42.0) |
| ≥25 | 6741 (51.1) | 27 987 (47.5) | 34 728 (48.2) | 198 (7.9) | 1156 (9.6) | 1354 (9.3) |
| Education (year) | ||||||
| 0 | 5004 (37.9) | 14 757 (25.0) | 19 761 (27.4) | 775 (30.8) | 2231 (18.5) | 3006 (20.6) |
| 1–5 | 3664 (27.8) | 14 301 (24.3) | 17 965 (24.9) | 727 (28.9) | 2896 (24.0) | 3623 (24.9) |
| ≥6 | 4524 (34.3) | 29 910 (50.7) | 34 434 (47.7) | 1013 (40.3) | 6925 (57.5) | 7938 (54.5) |
| Wealth quintiles | ||||||
| 1-poorest | 2685 (20.4) | 10 258 (17.4) | 12 943 (17.9) | 425 (16.9) | 1645 (13.6) | 2070 (14.2) |
| 2 | 2499 (18.9) | 10 194 (17.3) | 12 693 (17.6) | 464 (18.4) | 1924 (16.0) | 2388 (16.4) |
| 3 | 2633 (20.0) | 11 575 (19.6) | 14 208 (19.7) | 525 (20.9) | 2468 (20.5) | 2993 (20.5) |
| 4 | 2722 (20.6) | 12 892 (21.9) | 15 614 (21.6) | 544 (21.7) | 2820 (23.4) | 3364 (23.1) |
| 5-wealthiest | 2653 (20.1) | 14 049 (23.8) | 16 702 (23.2) | 557 (22.1) | 3195 (26.5) | 3752 (25.8) |
| Delivery type* | ||||||
| Normal vaginal delivery | 3143 (68.5) | 21 918 (69.2) | 25 061 (69.1) | 494 (82.2) | 3969 (75.4) | 4463 (76.1) |
| Caesarean section | 1443 (31.5) | 9764 (30.8) | 11 207 (30.9) | 107 (17.8) | 1294 (24.6) | 1401 (23.9) |
*Information available from 2005.