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

Table 2

Parameters estimated for BMI trajectories for men (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	21.20 (0.66)	0.17 (0.03)	0.001 (0.0005)	31.7%	0.87
N-OV	23.77 (0.52)	0.38 (0.03)	0.003 (0.0004)	43.6%	0.88
OV-OB	26.78 (0.77)	0.41 (0.04)	0.003 (0.0006)	20.3%	0.87
OB-UP	31.61 (1.43)	0.04 (0.08)	0.006 (0.001)	4.4%	0.86

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.