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Table 2 Duration of sunshine and mean serum vitamin D levels according to geographical region and gender

From: Regional variation and determinants of vitamin D status in sunshine-abundant Thailand

Regions

Duration of sunshine (hours/day)

25(OH)D (nmol/L)

 
  

Men

Women

Total

Bangkok

4.7 - 9.1

69.0 ± 0.6

61.1 ± 1.3*

64.8 ± 0.7***

Central

4.1 -8.5

86.5 ± 1.7**

73.0 ± 1.1*, **, ***

79.5 ± 1.1**, ***

North

3.6 - 8.1

88.5 ± 1.7**

75.1 ± 1.8*, **

81.7 ± 1.2**

Northeast

3.5 -8.0

87.8 ± 1.3**

76.7 ± 1.1*, **

82.2 ± 0.8**

South

2.0 - 8.8

87.7 ± 2.9**

69.5 ± 0.8*, **, ***

78.3 ± 1.3**, ***

Total

2.0 - 9.1

85.9 ± 1.1

73.0 ± 0.8*

79.3 ± 0.8

  1. Values are range or mean ± SE
  2. *Significantly different from men (p < 0.001), ** significantly different from Bangkok (p < 0.001), *** significantly different from Northeast (p < 0.05)