Table 2.

Quality Measures for Each Study

Studies	Matched Control Group	Controlled for Confounding	Crude vs Adjusted OR	Newcastle-Ottawa Score
Kim, 2014	no- women with HTN	yes	crude OR	9
Bhatia, 2006	yes-age matched	no	crude OR	6
Kane, 2008	yes-age, race and parity	yes	adjusted	8
Lees, 2009	yes-age and geographical location	yes	crude OR	7
Marehbian, 2009	yes-age, gender, health plan, available follow up	yes	adjusted	8
Hutfless, 2008	yes-age matched	yes	crude OR	8
Rungoe, 2014	yes-age matched	yes	crude OR	9
Singh 2009	yes-age, number of Paps, health coverage	yes	adjusted	8