Table 1.

Characteristics of the studies investigating the association between primary open-angle glaucoma (POAG) and blood pressure (BP) with adjustment for intraocular pressure (IOP).

Reference	Country	Sample size	Study design	Exposure	Outcome
Blue mountains eye study [44]	Australia	3654	Population-based survey	HTN	OAG
The Beijing eye study [20]	China	3222	Population-based survey	HTN	POAG
The Singapore Malay eye study [64]	Singapore	3280	Cross-sectional population-based study	SBP, DBP, HTN	POAG
Los Angeles Latino eye study [54]	USA	6130	Cross-sectional population-based study	SBP, DBP	OAG
Barbados eye study [52]	India	3222	Cohort study of prospective population-based study	SBP, DBP, HTN	OAG
The Rotterdam study [65]	Netherlands	5317	Cross-sectional prospective population-based study	SBP, DBP	OAG

HTN, hypertension; SBP, systolic blood pressure; DBP, diastolic blood pressure; OAG, open-angle glaucoma; POAG, primary open-angle glaucoma.