Table 1.
Characteristics of participants in two experimental groups. Values are numbers (percentages) of women unless stated otherwise
| Characteristic | No placebo (n=218) | Placebo (n=218) |
|---|---|---|
| Mean (SD) age (years) | 57.4 (4.7) | 57.2 (4.5) |
| Socioeconomic group:* | ||
| 1, 2, and 3 (non-manual)10 | 146 (68) | 166 (77) |
| Married or living with partner | 174 (80) | 172 (79) |
| White ethnic group | 217 (99) | 216 (99) |
| Smoking:* | ||
| Current | 54 (25) | 37 (17) |
| Ever | 47 (22) | 65 (30) |
| Never | 112 (53) | 115 (53) |
| Ever suffered from premenstrual tension | 92 (42) | 100 (46) |
| Ever used oral contraceptives | 103 (47) | 94 (43) |
| Ever used hormone replacement therapy | 37 (17) | 44 (20) |
Small amount of missing data reduced some denominators.
*
P<0.05.