Table 1 Unadjusted risks for sPTB according to some socio-demographic characteristics.
Characteristics | sPTB | Term Births | RR [95%CI] |
|---|---|---|---|
Region | |||
Northeast | 34 (43.6%) | 506 (48.7%) | Ref. |
South and Southeast | 44 (56.4%) | 534 (51.3%) | 1.21 [0.69–2.12] |
Maternal age (years) | |||
≤19 | 18 (23.1%) | 269 (25.9%) | 0.88 [0.55–1.42] |
20–34 | 54 (69.2%) | 705 (67.8%) | Ref. |
≥35 | 6 (7.7%) | 66 (6.3%) | 1.17 [0.27–5.15] |
Ethnicity | |||
White | 32 (41.0%) | 416 (40.0%) | Ref. |
Non-white | 46 (59%.0) | 624 (60.0%) | 0.96 [0.40–2.30] |
Marital status | |||
With partner | 52 (66.7%) | 762 (73.3%) | Ref. |
Without partner | 26 (33.3%) | 278 (26.7%) | 1.34 [0.99–1,81] |
Maternal Occupation | |||
Paid work | 41 (52.6%) | 512 (49.2%) | 1.11 [0.74–1.66] |
Housewife | 13 (16.7%) | 192 (18.5%) | 0.95 [0.36–2.54] |
Not working* | 24 (30.7%) | 360 (32.2%) | Ref. |
Schooling (years) | |||
<12 | 52 (66.7%) | 706 (67.9%) | Ref. |
≥12 | 26 (33.3%) | 334 (32.1%) | 1.05 [0.46–2.39] |
Annual Family Income (US$) | |||
Up to 3,000 | 2 (2.6%) | 48 (4.6%) | 0.53 [0.21–1.32] |
3,000 to 12,000 | 41 (52.5%) | 563 (54.1%) | 0.90 [0.55–1.47] |
Above 12,000 | 35 (44.9%) | 429 (41.3%) | Ref. |
Source of prenatal care | |||
Entirely public | 67 (85.9%) | 899 (86.4%) | 0.96 [0.54–1.70] |
Private/insurance/mixed | 11 (14.1%) | 141 (13.6%) | Ref. |
Total | 78 | 1,040 | |
