Table 1.

The prevalence of pterygium in underserved, rural villages of Iran by gender, location, age, and educational level.

		n	Pterygium
			% (95%CI)
	Total	3312	13.11 (11.75–14.47)
Gender	Female	1865	12.07 (10.30–13.84)
	Male	1447	14.99 (12.79–17.19)
Location	Southwest	1868	14.27 (12.38–16.17)
	North	1444	12.14 (10.13–14.15)
Age (years)	<=5	132	0
	6–20	772	0.19 (0.11–0.55)
	21–30	447	5.75 (3.17–8.33)
	31–40	493	16.43 (12.53–20.33)
	41–50	523	21.04 (16.86–25.22)
	51–60	457	23.05 (18.44–27.66)
	61–70	229	28.57 (21.59–35.55)
	>70	258	20.33 (14.48–26.18)
Education	Illiterate	1105	20.13 (17.30–22.95)
	Primary school	981	13.08 (10.56–15.6)
	Guidance School	354	9.68 (6.00–13.36)
	High school	624	6.62 (4.29–8.95)
	College	248	6.32 (2.70–9.94)

CI: Confidence interval.

n: Number of participants was analyzed.