Table 2 Adjusted relative risk (95% CI) per 100 kJ m−2 increase in total erythemal UVR dose during early life for type 1 diabetes developed by age 16 years in children born in Western Australia between 1980–2014.

From: Higher ultraviolet radiation during early life is associated with lower risk of childhood type 1 diabetes among boys

 

Combined

Boys

Girls

Relative riska (95% CI)

p value

Relative riska (95% CI)

p value

Relative riska (95% CI)

p value

First trimester

0.97 (0.88, 1.07)

0.52

0.92 (0.80, 1.06)

0.25

1.01 (0.88, 1.16)

0.87

Second trimester

0.97 (0.89, 1.05)

0.40

0.95 (0.85, 1.06)

0.34

0.98 (0.88, 1.10)

0.76

Third trimester

0.86 (0.76, 0.98)

0.02

0.80 (0.67, 0.95)

0.01

0.95 (0.79, 1.13)

0.57

Gestation periodb

0.95 (0.90, 1.00)

0.05

0.92 (0.85, 0.99)

0.02

0.98 (0.91, 1.05)

0.60

0–3 months

0.82 (0.70, 0.96)

0.01

0.71 (0.56, 0.90)

0.004

0.93 (0.75, 1.15)

0.51

3–6 months

0.81 (0.70, 0.95)

0.01

0.75 (0.60, 0.94)

0.01

0.89 (0.71, 1.10)

0.27

6–9 months

0.83 (0.70, 0.97)

0.01

0.76 (0.61, 0.95)

0.02

0.90 (0.72, 1.12)

0.34

9–12 months

0.84 (0.72, 0.96)

0.03

0.76 (0.60, 0.96)

0.02

0.93 (0.75, 1.16)

0.34

First year of life

0.95 (0.91, 0.99)

0.01

0.92 (0.86, 0.98)

0.01

0.97 (0.92, 1.03)

0.37

  1. aModels adjusted for ethnicity, maternal age, maternal diabetes, birth weight, parity, IEO, IRSD, caesarean section and gestational age at birth. Gestation models also adjusted for complications during pregnancy.
  2. bTrend in gestation trimester (total erythemal UVR dose for first, second and third trimester combined).
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