Table 3.

Association of 25-hydroxy Vitamin D and Tooth-specific Incidence of Changes of Clinical Attachment Loss ≥ 3 mm from SHIP-1 to SHIP-2 Based on Generalized Estimating Equations

	Risk Ratios (95% Confidence Intervals)
Cutoff	Model 1	Model 2
0-20 µg/L	1 (ref.)	1 (ref.)
≥ 21 µg/L	0.87 (0.78, 0.97)	0.91 (0.78, 1.07)
Increase
10 µg/L	0.93 (0.88, 0.98)	0.95 (0.87, 1.03)

SHIP-1, Study of Health in Pomerania, five-year follow-up; SHIP-2, 11-year follow-up.

Model 1: 25-hydroxy vitamin D.

Model 2: Model 2 plus age, sex, waist circumference, smoking, alcohol drinking, education, dental visit frequency, reason s for last dental visit, vitamin D or calcium supplements, and season of blood draw.