Table 2.

Analysis of risk factors for hypovitaminosis D in patients without vitamin D supplementation (A) and with vitamin D supplementation (B). Age (range 26–96 years); BMI (not categorised); nicotine abuse (yes or no); season (spring, summer, autumn, winter).

(A) Patients without oral supplementation
Predictor	Coefficient	n	Std. Error	T-Statistic	p-Value	95% CI
Sex Male vs. Female	1.66	98/98	1.47	1.12	0.26	−1.26; 0.47
Age	−0.02	196	0.08	−0.23	0.82	−0.17; 0.14
BMI	−0.36	196	0.12	−2.98	<0.01	−0.12; −2.98
Nicotine abuse	−7.51	21	2.47	−3.04	<0.01	−12.38; −2.64
Season	0.04	196	0.61	0.07	0.95	−1.17; 1.25
(B) Patients with oral supplementation
Predictor	Coefficient	n	Std. Error	T-Statistic	p-Value	95% CI
Sex Male vs. Female	2.65	9/48	4.98	0.53	0.59	−13.27; 10.62
Age	0.28	57	0.26	1.09	0.28	−0.24; 0.81
BMI	−0.01	57	0.03	−0.01	0.99	−0.62; 0.62
Nicotine abuse	−1.33	6	5.91	−0.22	0.82	−13.27; 10.62
Season	3.97	57	1.74	2.28	0.03	0.45; 7.49