Table 2.

Results of the negative binomial regression analyses of the association between the number of falls and both hyperkyphosis and change in the kyphosis angle

	Model 1a Ratio, 95% CI	p	Model 2 Ratio, 95% CI	p
Hyperkyphosis	IRR 1.15 (0.94–1.42)	0.182	IRR 1.12 (0.90–1.40)b	0.31
Oldest quartile	IRR 1.53 (1.10–2.12)	0.012	IRR 1.67 (1.14–2.45)b	0.008
Youngest 3 quartiles	IRR 0.87 (0.62–1.71)	0.925	IRR 0.91 (0.68–1.23)b	0.55
Change of kyphosis	IRR 1.01 (0.98–1.03)	0.654	IRR 1.00 (0.98–1.03)c	0.83

^aUnadjusted

^bCorrected for gender, cardiovascular comorbidity, and number of medications

^CCorrected for age and gender