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Table 1 Distribution of MSE in the right eye according to age and gender

From: Refractive errors and risk factors for myopia in infants aged 1–18 months in Tianjin, China

Age in months

N

Mean

SD

95% CI for mean

Lower bound

Upper bound

1–3

140

2.74

1.74

2.45–3.03

3–6

143

2.02

1.39

1.79–2.25

6–9

156

1.26

1.28

1.05–1.46

9–12

73

1.27

1.23

0.95–1.53

12–18

71

1.35

1.44

1.01–1.69

Total

583

1.81

1.56

1.68–1.94

P

<0.001

Boys

 

312

1.91

1.60

1.73–2.10

1–3

77

2.87

1.93

2.45–3.30

3–6

78

2.10

1.29

1.79–2.38

6–9

76

1.30

1.19

1.02–1.59

9–12

46

1.37

1.33

1.03–1.77

12–18

35

1.42

1.51

0.89–1.97

Girls

 

271

1.69

1.52

1.52–1.87

1–3

63

2.58

1.50

2.19–2.93

3–6

65

1.93

1.51

1.58–2.29

6–9

80

1.22

1.37

0.94–1.54

9–12

27

1.04

1.04

0.63–1.45

12–18

36

1.28

1.38

0.84–1.75

P

0.104