Table 4.

Factors associated with BMI development trajectory groups in boys and girls.

	Boys1			Girls2
Variable	Overweight becoming obese	Persistently obese	Variable	Persistently overweight	Persistently obese
	OR	OR		OR	OR
After school exercise			Television viewing or computer use
Low becoming high/persistently high	1.08	2.47	Persistently medium/persistently low level	1.41	1.96
Persistently low/persistently high	1.14	3.76∗∗	Persistently high level/persistently low level	2.26∗	4.03∗
Self-perceived academic performance			Family interactions
Low satisfaction/high satisfaction	1.36	2.30∗	Persistently medium level/persistently low level	1.72∗	1.21
			Persistently high level/persistently low level	1.39	1.06
Family interactions			Peer interactions
Low becoming medium/persistently low	1.41	2.14	Medium becoming high/persistently high	1.02	1.49
Medium becoming low/persistently low	1.52	0.66	High becoming low/persistently high	1.23	2.22∗
Persistently high/persistently low	2.32∗	2.02
Parent's overweight			Parent's overweight
Father overweight/neither parent overweight	1.71	4.23∗	Father overweight/neither parent overweight	1.75∗	1.42
Mother overweight/neither parent overweight	2.56	4.68∗	Mother overweight/neither parent overweight	1.55	1.11
Both parents overweight/neither parent overweight	1.53	8.22∗∗	Both parents overweight/neither parent overweight	2.31∗∗	6.84∗∗∗
Father's education level
Senior high school/junior high school and below	0.68	0.70
College and above/junior high school and below	0.44∗	0.50

¹The OR in boys has been adjusted for after-school exercise, self-perceived academic performance, family interactions, peer interactions, parent's overweight, and father's education level. Reference group: persistently normal weight.

²The OR in girls has been adjusted for television viewing or computer use, family interactions, peer interactions, and parent's overweight. Reference group: persistently normal weight.

*P < 0.05; **P < 0.01; ***P < 0.001.