Table 3.
Multinomial logistic regression analysis, with the 12MR score as outcome variable and BMI as the predictor variable.
| Low CRF |
Intermediate CRF |
|||||
|---|---|---|---|---|---|---|
| N | OR | 95% CI | N | OR | 95% CI | |
| Non-smokers | ||||||
| BMI | ||||||
| Normal weighta | 65 | 1.00 | 166 | 1.00 | ||
| Underweightb | 18 | 4.07 | 2.02–8.2 | 24 | 2.12 | 1.13–3.99 |
| Overweight/obesec | 49 | 6.37 | 3.80–10.7 | 36 | 1.83 | 1.10–3.05 |
| Occasional smokersd | ||||||
| BMI | ||||||
| Normal weighta | 26 | 1.00 | 131 | 1.00 | ||
| Underweight | 0 | 0.40 | 0.00–2.04 | 8 | 0.87 | 0.29–2.5 |
| Overweight/obese | 19 | 6.07 | 2.62–14.3 | 41 | 2.63 | 1.38–5.2 |
| Regular smokers | ||||||
| BMI | ||||||
| Normal weighta | 74 | 1.00 | 172 | 1.00 | ||
| Underweight | 9 | 2.05 | 0.76–5.5 | 34 | 3.34 | 1.50–7.4 |
| Overweight/obese | 65 | 16.9 | 7.39–38.8 | 41 | 5.00 | 2.00–10.6 |
The ORs denote odds of belonging to the lowest quintile (low CRF) or to the second or third quintile (intermediate CRF), compared to belonging to the fourth of fifth quintile (high CRF). Separate analyses by smoking.
12MR, Cooper’s 12-minute run test; BMI, body mass index; CI, confidence interval; CRF, cardiorespiratory fitness; N, number of subjects; OR, odds ratio.
aNormal weight (18.5 ≤ BMI < 25) is the reference category.
bBMI < 18.5.
cBMI ≥ 25.
dExact test.