Table 2.

The mean vitamin D level based on the Charlson Comorbidity Index and the individual comorbidities

Variables	n = 796	%	25(OH)D, ng/ml (mean ± SD)	p-value
Age-adjusted CCI
1–2	62	7.8	20.1 ± 7.2
3–4	377	47.4	20.4 ± 6.9	0.971
5–6	257	32.3	20.5 ± 7.2
≥ 7	100	12.6	20.5 ± 9.6
DM
No	596	74.9	20.4 ± 7.1	0.973
Yes	200	25.1	20.4 ± 8.1
DM with end organ damage
No	790	99.2	20.5 ± 7.4	0.009
Yes	6	0.8	12.6 ± 5.0
Myocardial infarction
No	771	96.9	20.5 ± 7.3	0.208
Yes	25	3.1	18.6 ± 9.3
Congestive cardiac failure
No	767	96.4	20.6 ± 7.3	0.015
Yes	29	3.6	17.1 ± 7.7
Cerebrovascular accident
No	678	85.2	20.3 ± 7.4	0.388
Yes	118	14.8	21.0 ± 7.3
Hemiplegia
No	768	96.5	20.4 ± 7.3	0.920
Yes	28	3.5	20.6 ± 8.6
Dementia
No	744	93.5	20.3 ± 7.3	0.010
Yes	52	6.5	23.0 ± 7.9
COPD
No	778	97.7	20.5 ± 7.4	0.197
Yes	18	2.3	18.2 ± 7.6
Connective tissue disease
No	100	100.0	20.4 ± 7.4	–
Yes	0	0.0	–
PUD
No	762	95.7	20.4 ± 7.4	0.710
Yes	34	4.3	20.9 ± 7.9
Chronic kidney disease
No	717	90.1	20.7 ± 7.2	0.016
Yes	79	9.9	18.1 ± 8.9
Peripheral vascular disease
No	783	98.4	20.4 ± 7.3	0.605
Yes	13	1.6	19.4 ± 9.4
Cancer
No	743	93.3	20.2 ± 7.2	0.001
Yes	53	6.7	23.7 ± 8.8
Metastasis
No	790	99.2	20.4 ± 7.4	0.806
Yes	6	0.8	21.2 ± 7.5
Depression
No	773	97.1	20.4 ± 7.3	0.751
Yes	23	2.9	21.1 ± 10.2
Warfarin
No	787	98.9	20.4 ± 7.4	0.837
Yes	9	1.1	20.9 ± 5.4
Mild liver
No	783	98.4	20.5 ± 7.4	0.188
Yes	13	1.6	17.8 ± 7.1
Severe liver
No	790	99.2	20.4 ± 7.3	0.717
Yes	6	0.8	22.8 ± 15.1
AIDS
No	794	99.7	20.4 ± 7.4	0.139
Yes	2	0.3	28.2 ± 12.5

Abbreviations: CCI Charlson Comorbidity Index, DM diabetes mellitus, COPD chronic obstructive pulmonary disease, PUD peptic ulcer disease, AIDS acquired immunodeficiency syndrome