Deficiency (≤20 ng/mL)
Insufficiency (20-30 ng/mL) Sufficiency (≥30 ng/mL)
p
Total 408852 (57.9) 162363 (23.0) 135219 (19.1) <0.001
Female 277384 (59.2) 101542 (21.6) 90102 (19.2) <0.001*
Male 131468 (55.4) 60821 (25.6) 45117 (19.0) <0.001*
Age
Female 47.03±16.7 50.21±16.8 52.9±16.3 0.730
Male 49.14±17.2 50.05±16.6 52.4±16.1
Frequency according to seasons
Winter 106974 (63.5) 32607 (19.4) 28843 (17.1) <0.001
Spring 128163 (63.8) 36521 (18.2) 36178 (18.0) <0.001
Summer 84603 (54.3) 42631 (27.3) 28701 (18.4) <0.001
Autumn 89112 (49.2) 50604 (27.9) 41497 (22.9) <0.001