Physical activity levels and weight control status by body mass index, among adults – National Health and Nutrition Examination Survey 1999–2004

Table 2 The association between physical activity level and weight control status by BMI.

	Physical activity level (min/wk)
	Men				Women
	< 150	150–420	420–630	≥ 630	< 150	150–420	420–630	≥ 630
BMI	OR ^a (95% CI)	OR ^a (95% CI)	OR ^a (95% CI)	OR ^a (95% CI)	OR ^a (95% CI)	OR ^a (95% CI)	OR ^a (95% CI)	OR ^a (95% CI)
Normal weight
Trying to lose	0.6 (0.4–0.8)	1.8 (1.3–2.3)	1.6 (1.1–2.3)	1.6 (1.1–2.3)	0.5 (0.4–0.7)	1.9 (1.5–2.4)	1.7 (1.2–2.4)	2.0 (1.4–3.0)
Trying to maintain	0.3 (0.2–0.5)	3.2 (2.2–4.6)	2.3 (1.6–3.2)	1.9 (1.2–3.1)	0.5 (0.4–0.8)	1.9 (1.2–2.9)	1.5 (1.0–2.4)	2.1 (1.4–3.3)
Not trying to lose/maintain	1.0	1.0	1.0	1.0	1.0	1.0	1.0	1.0
Overweight
Trying to lose	0.5 (0.4–0.6)	2.2 (1.8–2.9)	1.9 (1.5–2.4)	1.9 (1.5–2.5)	0.4 (0.3–0.5)	2.8 (2.1–3.7)	1.6 (1.1–2.3)	1.8 (1.1–2.9)
Trying to maintain	0.5 (0.4–0.8)	1.9 (1.3–2.8)	1.6 (1.1–2.4)	1.7 (1.2–2.5)	0.4 (0.3–0.7)	2.6 (1.5–4.4)	1.4 (0.6–3.1)	1.8 (0.5–6.3)^b
Not trying to lose/maintain	1.0	1.0	1.0	1.0	1.0	1.0	1.0	1.0
Obese
Trying to lose	0.4 (0.3–0.6)	2.4 (1.7–3.3)	2.3 (1.5–3.4)	2.6 (1.5–4.6)	0.4 (0.3–0.6)	2.6 (1.7–4.0)	2.5 (1.3–4.9)	5.6 (1.2–5.7)
Trying to maintain	0.4 (0.3–0.7)	2.3 (1.4–3.9)	3.4 (1.9–6.3)^b	3.9 (2.1–7.4)^b	1.1 (0.5–2.3)	0.9 (0.4–1.9)	0.7 (0.2–2.5)	1.5 (0.3–6.5)^b
Not trying to lose/maintain	1.0	1.0	1.0	1.0	1.0	1.0	1.0	1.0

^a Separate logistic regression equations for each physical activity variable. Dependent variables: < 150 min/week (yes/no), 150–420 min/week (yes/no), 420–630 min/week (yes/no), ≥ 630 min/week (yes/no). Models are adjusted for age, race/ethnicity, and education.
^b Estimates may be unstable because sample size is < 50.

ISSN: 1479-5868