Table 3.

IRR for Number of Hospitalizations in the First Year in the Lower 2 Tertiles of 25-OH Vitamin D

Number of Hospitalizations in the First Year	IRR for Lowest Tertile (95% CI)	IRR for Middle Tertile (95% CI)
Crude	1.42 (1.00–2.01)	1.49 (0.97–2.26)
Adjusted for age	1.78 (1.21–2.61)	1.80 (1.18–2.74)
Adjusted for age, gender, race	1.72 (1.13–2.63)	1.74 (1.11–2.74)
Multivariable adjusted*	1.66 (1.10–2.51)	1.70 (1.06–2.72)

CI, confidence interval; IRR, incidence rate ratio; 25-OH vitamin D, 25-hydroxy vitamin D.

The rate of hospitalizations in the first year of dialysis therapy was higher for patients with 25-OH vitamin D concentrations in the lower 2 tertiles compared with patients with 25-OH vitamin D concentrations .>15.5 ng/mL. P value for trend = .0531.

^*Adjusted for age, gender, race, body mass index, diabetes, treatment modality (hemodialysis vs. peritoneal dialysis), and facility.