Table 3 Seasonal differences in vitamin D level in cases and controls
From: Vitamin D level in Egyptian children with otitis media with effusion
Group | Season | Serum vitamin D level (ng/ml) | P-value* |
|---|---|---|---|
All study population (n=100) | Autumn and winter (n=47) | 14.6 ± 5.2 | 0.013 |
Spring and summer (n=53) | 17.4 ± 5.9 | ||
Cases (n=50) | Autumn and winter (n=27) | 15.5 ± 6.3 | 0.570 |
Spring and summer (n=23) | 16.5 ± 5.8 | ||
Controls (n=50) | Autumn and winter (n=20) | 13.8 ± 3.9 | 0.004 |
Spring and summer (n=30) | 18.5 ± 5.8 |