From: Vitamin D deficiency in patients with cluster headache: a preliminary study
According to sample seasons | Seasonal propensity | No seasonal propensity (n = 8) | p-value | |
---|---|---|---|---|
Winter to spring (n = 7) | Summer to autumn (n = 7) | |||
Winter to spring (n = 12) | 12.28 ± 1.93a (n = 5) | 13.00 ± 3.39c (n = 2) | 9.48 ± 1.61e (n = 5) | 0.001 |
Summer to autumn (n = 10) | 12.35 ± 0.07b (n = 2) | 18.54 ± 4.38d (n = 5) | 16.97 ± 1.82f (n = 3) |  |