Table 1.
Age-standardized Midpoint Characteristics of the Study Population According to Menopausal Status, Nurses’ Health Study II (2001)a
| Characteristic | Premenopausal Women (n=48749) |
Postmenopausal Women (n=16546) |
|---|---|---|
| Age, yb | 45.0 (4.1) | 50.7 (3.5) |
| Body Mass Index, kg/m2 | 26.6 (6.2) | 27.5 (6.5) |
| Waist Circumference (1993), cm | 77.8 (12.6) | 79.1 (13.7) |
| Physical Activity, MET-hrs/wkc | 13.1 (4.5-28.8) | 11.5 (4.0-26.2) |
| Smoking Status, % | ||
| Never | 68.5 | 62.4 |
| Past | 24.5 | 25.3 |
| Current | 6.7 | 12.0 |
| History of Hypertension, % | 15.1 | 21.8 |
| History of Diabetes, % | 2.1 | 3.8 |
| History of Tinnitus, % | 6.4 | 8.4 |
| White Race, % | 94.7 | 94.3 |
| Ibuprofen Used % | 20.9 | 21.8 |
| Acetaminophen Used, % | 8.8 | 12.6 |
| Alcohol Intake, g/d | 1.1(0-4.9) | 1.1 (0-4.7) |
| Never Use of HTe, % | -- | 20.5 |
| Oral HT (ever), % | -- | 61.6 |
| Non-oral HT (ever), % | -- | 16.6 |
| HT, unknown type (ever), % | -- | 1.3 |
a
Values, except for age, are standardized to the age distribution of the study population. Polytomous variables may not sum to 100% because of rounding. Characteristics at the approximate study midpoint (2001) are presented to provide a representation of the population at an intermediate time point during follow-up period.
b
Mean (SD) for all such values.
c
Median (IQR) for all such values, not age-standardized. METS, metabolic equivalent tasks from recreational and leisure-time activities.
d
Two days per week or more.
e
HT, hormone therapy