Table 3 The Association Between refractive errors and Iris Color in Multiple Logistic Regression Models.

From: The association between iris color and refractive errors in children

Independent variables

Myopia

Hyperopia

(Odds ratio (95% CI))

P value

(Odds ratio (95% CI))

P value

Iris color

Dark Brown

Reference group

Reference group

Light Brown

1.02 (0.69–1.51)

0.936

1.29 (0.85–1.96)

0.230

Amber

4.79 (1.23–18.70)

0.024

0.87 (0.11–6.85)

0.898

Light Blue

0.81 (0.11–5.76)

0.833

2.36 (0.54–10.30)

0.251

Green

0.36 (0.05–2.73)

0.321

1.47 (0.41–5.29)

0.554

Hazel

0.62 (0.21–1.82)

0.385

0.81 (0.26–2.53)

0.720

Age (year)

1.21 (1.08–1.35)

0.001

0.80 (0.73–0.88)

 < 0.001

Female gender

0.16 (0.03–1.08)

0.060

1.42 (0.99–2.02)

0.055

Age * Sex (Girl)

1.21 (1.02–1.44)

0.031

Urban residence

1.75 (1.15–2.65)

0.009

0.94 (0.62–1.43)

0.786

Outdoor activity time (hour/day)

0.999 (0.997–1.001)

0.314

0.999 (0.996–1.001)

0.339

Time spent for watching TV and digital games (hour/day)

1.001 (0.999–1.003)

0.228

1.002 (1.000–1.004)

0.052

  1. CI confidence intervals.