Table 3.

Prevalence of Strabismus in Children Aged 6 to 72 Months

	n	Any Strabismus* n (%, 95% CI)	Exotropia n (%, 95% CI)	Esotropia n (%, 95% CI)
All children
Crude rate	3009	24 (0.80, 0.51–1.19)	20 (0.67, 0.41–1.03)	3 (0.10, 0.02–0.29)
Adjusted rate†		(0.84, 0.80–0.88)	(0.70, 0.66–0.74)	(0.10, 0.086–0.12)
6–11 mo	189	0 (0, 0.0–1.9)	0 (0, 0.0–1.6)	0 (0, 0.0–1.6)
12–23 mo	537	2 (0.37, 0.04–1.32)	2 (0.37, 0.04–1.32)	0 (0, 0.0–0.55)
24–35 mo	514	5 (0.97, 0.31–2.23)	3 (0.58, 0.12–1.68)	2 (0.39, 0.005–1.07)
36–47 mo	574	4 (0.69, 0.11–1.50)	3 (0.52, 0.11–1.50)	1 (0, 0.0–0.51)
48–59 mo	602	7 (1.16, 0.46–2.35)	7 (1.16, 0.46–2.35)	0 (0, 0.0–0.49)
60–72 mo	576	6 (1.04, 0.38–2.23)	5 (0.86, 0.28–1.99)	0 (0, 0.0–0.95)
P (trend)		0.08	0.07	0.57
Boys (all)	1561	14 (0.89, 0.44–1.41)	12 (0.77, 0.39–1.33)	1 (0.064, 0.002–0.36)
6–11 mo	88	0 (0, 0.0–3.27)	0 (0, 0.0–3.27)	0 (0, 0.0–3.27)
12–23 mo	308	1 (0.32, 0.008–1.79)	1 (0.33, 0.008–1.79)	0 (0, 0.0–0.96)
24–35 mo	262	1 (0.38, 0.01–2.10)	1 (0.38, 0.01–2.10)	0 (0, 0.0–1.13)
36–47 mo	291	4 (1.36, 0.21–2.94)	3 (1.02, 0.21–2.94)	1 (0.34, 0.01–1.89)
48–59 mo	321	4 (1.24, 0.33–3.11)	4 (1.23, 0.33–3.11)	0 (0, 0.0–0.91)
60–72 mo	291	4 (1.37, 0.37–3.45)	3 (1.03, 0.21–2.96)	0 (0, 0.0–1.02)
P (trend)		0.06	0.10	0.92
Girls (all)	1431	10 (0.69, 0.33–1.27)	8 (0.56, 0.24–1.09)	2 (0.14, 0.02–0.50)
6–11 mo	101	0 (0, 0.0–2.92)	0 (0, 0.0–2.92)	0 (0, 0.0–2.92)
12–23 mo	229	1 (0.44, 0.01–2.37)	1 (0.44, 0.01–2.37)	0 (0, 0.0–1.28)
24–35 mo	252	4 (1.58, 0.43–3.95)	2 (0.79, 0.09–2.79)	2 (0.80, 0.01–2.16)
36–47 mo	283	0 (0, 0.0–1.04)	0 (0, 0.0–1.04)	0 (0, 0.0–1.04)
48–59 mo	281	3 (1.06, 0.22–3.08)	3 (1.06, 0.22–3.08)	0 (0, 0.0–1.06)
60–72 mo	285	2 (0.69, 0.08–2.48)	2 (0.70, 0.08–2.48)	0 (0, 0.0–1.91)
P (trend)		0.67	0.38	0.43

95% CI, binomial distribution.

^*Includes 1 child, a 71-month-old boy, who had DVD alone.

^†Weighted to Census of Population 2000 (taking into account Location sampling and familial clustering).³³