Trajectories of Body Mass Index from Young Adulthood to Middle Age among Canadian Men and Women

Table 1

Parameters estimated for BMI trajectories for women (20–55 years), NPHS, 1994–2011.

The trajectory of BMI	Intercept-BMI at age 20 (s.e.)	Linear term (s.e.)	Quadratic term (s.e.)	GMP	AvePP
N-S	19.75 (0.16)	0.09 (0.004)	—	40.9%	0.87
N-OV	22.57 (0.21)	0.16 (0.005)	—	33.7%	0.87
OV-OB	26.38 (0.29)	0.25 (0.007)	—	18.2%	0.87
OB-UP	32.42 (1.34)	0.71 (0.075)	0.005 (0.001)	7.2%	0.88

N-S, normal stable group; N-OV, normal weight to overweight group; OV-OB, overweight to obesity group; OB-UP, obesity-up group; GMP, group membership probability; AvePP, average posterior probability; and s.e., standard error.