Table 1.
Characteristics of the included studies
|
(a). Characteristics of the studies included for maternal genotype analysis | ||||||||
|
Author |
Year |
Country |
Populations |
PPROM Excluded? |
PTB cases group criteria |
Case sample size |
Control group criteria |
Control sample size |
|
Women of European descent | ||||||||
| Annells et al |
2004 |
Australia |
White |
No |
GA<35 |
202 |
GA≥37 |
185 |
| Hartel et al |
2004 |
Germany |
White |
No |
GA<37 and VLBW |
365 |
GA≥37 |
281 |
| Hollegaard et al |
2008 |
Denmark |
White |
No |
GA<37 |
62 |
GA≥37 |
55 |
| Menon et al |
2005 |
TN & PA, USA |
White |
No |
GA<36 |
101 |
GA≥37 |
326 |
| Simhan et al |
2003 |
PA. USA |
White |
Yes |
GA<34 |
39 |
GA≥37 |
110 |
| Stonek et al |
2008 |
Austria |
White |
No |
GA<34 |
21 |
GA≥37 |
1367 |
|
Heterogeneous population | ||||||||
| Gomez et al |
2010 |
PA, USA |
African American, and others |
No |
GA<37 |
60 |
GA≥37 |
636 |
| Harper et al |
2011 |
USA |
White, African American, Asian, and Others |
No |
GA<28 |
33 |
GA≥37 |
549 |
| Moura et al |
2009 |
Brazil |
Mulatto |
No |
GA<37 |
111 |
GA≥37 |
94 |
| Moura et al |
2009 |
Brazil |
Mulatto and White |
No |
GA<37 |
80 |
GA≥37 |
101 |
| Simhan et al |
2003 |
PA. USA |
African American |
Yes |
GA<34 |
12 |
GA≥37 |
46 |
| Speer et al |
2006 |
IL, USA |
White, African American, and Others |
No |
GA<35 |
79 |
GA≥37 |
80 |
|
(b). Characteristics of the studies included for fetal genotype analysis | ||||||||
|
Women of European descent | ||||||||
| Hartel et al |
2004 |
Germany |
White |
No |
GA<37 and VLBW |
606 |
GA≥37 |
491 |
|
Heterogeneous population | ||||||||
| Pereyra et al |
2012 |
Uruguay |
Uruguayan |
No |
GA<37 |
53 |
GA≥37 |
56 |
| Speer et al |
2006 |
IL, USA |
White, African American, and Others |
No |
GA<35 |
78 |
GA≥37 |
78 |
| Velez et al | 2007 | TN & PA, USA | African American | Yes | GA<36 | 48 | GA≥37 | 257 |