Prevalence and risk factors for age-related cataract in Sweden

Figures & data

Table 1. Prevalence of cataract in subjects 65–74 years of age in the Framingham Eye Study, the Beaver Dam Eye Study, and the Blue Mountains Eye Study.

Study	Ref.	Method	Prevalence (%)
Framingham	(3)	Slit-lamp, ophthalmoscopy	Total 18.0^a
			Females 19.3
			Males 16.0
Beaver Dam	(4)	Photography	Total 74.3^b
			Females 76.3
			Males 71.4
Blue Mountains	(5)	Photography	Total 68.4^b
			Females 73.2
			Males 62.2

^a Only individuals with visual acuity of 20/30 or worse in either eye were examined; including subjects with a history of cataract surgery.

^b Right eye only.

Table 2. Participation in the population survey in Tierp, by age and gender.

	Females (n = 429)				Males (n = 409)
	Examined				Examined
Age	Yes	(%)	No	(%)	Yes	(%)	No	(%)
65 − 69 years	209	(93.3)	15	(6.7)	195	(90.7)	20	(9.3)
70 − 74 years	187	(91.2)	18	(8.8)	169	(87.1)	25	(12.9)
65 − 74 years	396	(92.3)	33	(7.7)	364	(89.0)	45	(11.0)

Table 3. Prevalence of cataract in the population survey in Tierp, by age and gender.^a

	Females (n = 396)		Males (n = 364)
Age	Prevalence	95% CI	Prevalence	95% CI
65 − 69 years	26.3%	20.3–32.2	22.1%	16.2–27.9
70 − 74 years	45.9%	37.8–52.0	30.8%	23.8–37.7
65 − 74 years^b	35.2%	28.7–41.8	26.2%	19.8–32.6

Difference (females − males): 9.0% (95% CI −0.2 to 18.1).

^a Including past cataract surgery.

^b Adjusted for nonparticipation.

CI: confidence interval.

Table 4. Odds ratios for cataract in the population survey in Tierp, adjusted for age and gender.

		No. of cases
Characteristics		(n = 234)	ORM-H	95% CI
Age ≥70 years^a	No	98	1.00
	Yes	136	1.93	1.41 − 2.64
Female gender^b	No	95	1.00
	Yes	139	1.54	1.12 − 2.11
Pseudoexfoliation, either eye	No	189	1.00
	Yes	45	1.12	0.75 − 1.68
Myopia, either eye	No	209	1.00
	Yes	25	2.03	1.16 − 3.56
Current smoker	No	206	1.00
	Yes	28	0.73	0.46 − 1.17
Diabetes	No	201	1.00
	Yes	33	1.25	0.79 − 1.99
Hypertension, treated	No	159	1.00
	Yes	75	1.26	0.90 − 1.78
Ischaemic heart disease	No	195	1.00
	Yes	39	1.18	0.77 − 1.80

^a Adjusted for gender.

^b Adjusted for age.

CI: confidence interval; OR_M-H: Mantel–Haenszel adjusted odds ratio.

Leibowitz HM, Krueger DE, Maunder LR, Milton RC, Kini MM, Kahn HA, et al. The Framingham eye study monograph. Surv Ophthalmol. 1980;24:350–65.

 Web of Science ®Google Scholar

Klein BEK, Klein R, Linton KLP. Prevalence of age-related lens opacities in a population: The Beaver Dam Eye Study. Ophthalmology 1992;99:546–52.

 PubMed Web of Science ®Google Scholar

Mitchell P, Cumming RG, Attebo K, Panchapakesan J. Prevalence of cataract in Australia: the Blue Mountains eye study. Ophthalmology 1997;104:581–8.

 PubMed Web of Science ®Google Scholar