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.

Kruger et al. International Journal of Behavioral Nutrition and Physical Activity 2008 5:25   doi:10.1186/1479-5868-5-25