Trajectories of body mass index among Canadian seniors and associated mortality risk

BMC Public Health

Table 2 Adjusted hazard ratios of BMI trajectories among women from cox proportional hazard models in the NPHS, 1994–2011

	Women
	Unadjusted model		Adjusted demographics factorsc		Fully adjusted modeld
	Unadjusted model		Adjusted demographics factorsc			>3 conditions	<3 conditions
	N(%) death	HR(95% CI)	P-value	HR(95% CI)	P-value	HR(95% CI)	HR(95% CI)
BMI Traj
OV-N	385 (32.9)	1.00 (ref.)		1.00(ref.)		1.00(ref.)	1.00(ref.)
N-D	291 (39.8)	1.32(1.03–1.69)	0.03	1.31(1.02–1.69)	0.04	1.23(0.86–1.77)	1.21(0.84–1.74)
OB I-D	205 (40.2)	1.25(0.94–1.65)	0.12	1.09(0.82–1.45)	0.54	1.61(1.12–2.31)	0.56(0.35–0.90)
OB II-D	39 (36.7)	1.05(0.55–1.98)	0.89	0.89(0.47–1.68)	0.71	0.71(0.30–1.67)	1.34(0.50–3.58)

NB: BMI body mass index, NPHS the National Population Health Survey, N-D normal weight-down, OV-N overweight-normal weight, OB I-D = obese I-down, and OB II-D obese II- down; CI confidence interval, HR hazard ratio
^cAdjusted for age at baseline, race/ethnicity, education
^dFully adjusted for age at baseline, race/ethnicity, education, place of residence, disability, the probability of being physically active, smoking, and drinking, as well as the change patterns of the number of chronic conditions, and two interactions (the interaction between the BMI trajectory and the developmental of the number of chronic conditions trajectory and the interaction between age at baseline and the probability of being physically active trajectory)

ISSN: 1471-2458