Table 3: Comparisons between patients' subgroups regarding vitamin D deficiency (< 20 ng/ml).
Vitamin D | HF + RF | HF | RF | Chi-square test | ||||
No. | % | No. | % | No. | % | X2 | P-value | |
Deficient | 29 | 96.70% | 13 | 43.30% | 23 | 76.70% | 21.711 | < 0.001 |
Normal level | 1 | 3.30% | 17 | 56.70% | 7 | 23.30% |