Distribution of Intraocular Pressure and Its Determinants in an Iranian Adult Population Publisher



Hashemi H^{1, 2} ; Khabazkhoob M³ ; Emamian MH⁴ ; Shariati M⁵ ; Yekta A⁶ ; Fotouhi A⁷ Show Affiliations
Source: International Journal of Ophthalmology Published:2016

Abstract

AIM: To determine the distribution of intraocular pressure (IOP) and its determinants in an Iranian population. • METHODS: In a cross-sectional survey, random cluster sampling was conducted from the 40-64 years old population of Shahroud, in the north of Iran. All participants had optometry and ophthalmic exams. IOP was determined using the Goldmann tonometry method and biometric components were measured. • RESULTS: Of the 6311 people selected for the study, 5190 (82.2%) participated. The mean age of the participants was 50.9±6.2y and 58.7% of them were female. Mean IOP was 12.87 ±2.27 mm Hg. In this study 0.3% of the participants had an IOP higher than 21 mm Hg. The multiple linear regression model revealed that sex (Coef=-0.30; 95% CI:-0.43 to-0.17), diabetes (Coef = 0.43; 95% CI: 0.19 to 0.67), high systolic blood pressure (Coef=0.02; 95% CI: 0.01 to 0.02), high body mass index (BMI) (Coef=0.03; 95% CI: 0.01 to 0.04), higher education (Coef=0.02, 95% CI: 0.01 to 0.04), thicker central corneal thickness (Coef=0.01; 95% CI: 0.01 to 0.02), and myopic shift in spherical equivalent (Coef=-0.14; 95% CI:-0.18 to-0.10) significantly correlated with high IOP. • CONCLUSION: The IOP in this 40-64 years old population is low overall. In the north of Iran, average IOP is statistically significantly correlated with female sex, diabetes, higher BMI, systolic blood pressure, higher education, thicker cornea, and myopic refractive error. © 2016 International Journal of Ophthalmology (c/o Editorial Office). All rights reserved.