Table 2.
Baseline Characteristics of Participants in a Study of Body Composition, Physical Activity, and Current Asthma (n = 15,353), Asthma-E3N Study, 2000
| Characteristic | No. of Missing Values | Mean (SD) | % |
|---|---|---|---|
| Age, years | 0 | 59.2 (6.3) | |
| Educational levela | 569 | ||
| Less than high school | 10.7 | ||
| High school to level 2 university diploma (US associate's degree) | 51.2 | ||
| Level 3/4 university diploma (US bachelor's degree) | 19.0 | ||
| Level 5 university diploma or more (US graduate level) | 19.2 | ||
| Smoking status | 2 | ||
| Never smoker | 52.5 | ||
| Former smoker | 39.0 | ||
| Active smoker | 8.5 | ||
| Menopausal status | 136 | ||
| Nonmenopausal | 10.1 | ||
| Menopausal without HRT | 20.8 | ||
| Menopausal with HRT | 69.1 | ||
| Total energy intake, kcal/day | 2,226 (557) | ||
| Physical activity, MET-hours/week | 1,005 | 71.1 (39.3) | |
| BMIb (continuous) | 149 | 23.7 (3.7) | |
| BMI category | 149 | ||
| <20.0 | 12.2 | ||
| 20.0–24.9 | 58.2 | ||
| 25.0–29.9 | 23.5 | ||
| ≥30.0 | 6.1 | ||
| Ever having an asthma attack | 1 | ||
| Never | 77.3 | ||
| Ever (inconsistent) | 17.3 | ||
| Ever (consistent) | 5.5 |
Abbreviations: BMI, body mass index; E3N, Etude Epidémiologique auprès de Femmes de la Mutuelle Générale de l'Education Nationale; HRT, hormone replacement therapy; MET, metabolic equivalent of task; SD, standard deviation.
a Measured in 1990.
b Weight (kg)/height (m)2.