From: Clinical audit of health promotion of vitamin D in one general practice
 |  |  | Number | ||
---|---|---|---|---|---|
Season | n | Mean 25-OHD level (nmol/l) | < 51 nmol/l | 51-79 nmol/l | 80+ nmol/l |
Autumn | 91 | 66.1 | 28 | 42 | 21 |
Winter | 38 | 54.7 | 20 | 11 | 7 |
Spring | 54 | 53.8 | 29 | 18 | 7 |
Summer | 83 | 73.7 | 12 | 38 | 33 |