Table 2. Synthesis of articles assessing the association between race/skin color and prematurity, 2010 to 2014.
| Author/Year | Place of study | Type of study | Sample (n) | Maternal age | Prematurity (%) | Incidence among black women | Incidence among non-black women | Adjusted measure of association | Quality of the article |
|---|---|---|---|---|---|---|---|---|---|
| Almeida et al. 27 (2014) | New York/USA | Cross-sectional | 4,443 | 80% under 35 years | 8.0 | 14.6 | 5.4 | OR = 3.01 | Good |
| Castrillio et al. 28 (2014) | Chicago/USA | Cross-sectional | 267,303 | Up to 35 years | 5.3 | 19.8 | 9.0 | RR = 1.2 | Excellent |
| Collins Jr et al. 29 (2013) | Chicago/USA | Cross-sectional | 267,303 | 60% (20 to 29 years) | 7.2 | 15.1 | 6.7 | OR = 1.9 | Good |
| Flores et al. 30 (2012) | Chicago/USA | Cross-sectional | 196,617 | 86% (20 to 34 years) | 14.0 | 9.0 | 8.1 | OR = 1.04 | Good |
| Hwang et al. 31 (2013) | Washington and Montana/USA | Retrospective cohort | 24,648 | < 18 years | 9.6 | 11.0 | 8.0 | OR = 1.34 | Good |
| Shempf et al. 32 (2011) | North Carolina/USA | Cross-sectional | 31,489 | 50% (25 to 34 years) | 7.4 | 13.1 | 6.9 | RR = 3.0 | Excellent |
| Shaw et al. 33 (2010) | USA | Retrospective cohort | 1,223,751 | 20 to 35 years | 12.5 | 15.6 | 10.17 | OR = 1.37 | Good |
| Shaw et al. 39 (2013) | USA | Retrospective cohort | 2,646,176 | 20 to 29 years | 9.9 | 15.6 | 8.5 | OR = 1.09 | Good |
| Sullivan et al. 34 (2012) | Texas/USA | Cross-sectional | 369,839 | ≥ 18 years | 13.7 | 18.4 | 12.3 | OR = 0.48 | Excellent |
| Whitehead; Helms 40 (2010) | New York/USA | Cross-sectional | 343,988 | 18 to 34 years | 7.2 | 7.3 | 7.8 | RR = 0.95 | Good |
| Xiong; Pridjian; Dickey 41 (2013) | USA | Retrospective cohort | 50,377 | > 70% (30 to 39 years) | 13.7 | 24.0 | 12.9 | OR = 2.1 | Regular |
| Zhang et al. 35 (2013) | USA | Cross-sectional | 1,472,912 | > 50% (18 to 24 years) | 5.7 | 10.0 | 7.2 | OR = 1.34 | Regular |
| Mohamed et al. 36 (2012) | USA | Retrospective cohort | 17,338 | 25 to 35 years | 10.1 | 22.1 | 12.8 | OR = 1.61 | Good |
| Coley; Aronson 42 (2013) | North Carolina/USA | Cross-sectional | 10,515 | 17 to 19 years | 8.4 | 11.0 | 9.2 | - | Regular |
| Jongh et al. 38 (2014) | USA | Retrospective cohort | 11,711 | 20 to 34 years | 3.9 | 13.5 | 8.8 | OR = 1.36 | Good |
| Fujimoto et al. 37 (2010) | USA | Retrospective cohort | 139,027 | 35 to 39 years | 15.2 | 21.0 | 14.8 | OR = 1.79 | Excellent |
| Torloni et al. 26 (2012) | Tennessee/USA | Case control | 1,762 | 20 to 34 years | 8.3 | 21.7 | 27.6 | OR = 1.29 | Good |