Table 1.
Selected descriptive characteristics of SWAN Sleep Study, N = 163
| Variable | Description | Median (IQRa) |
|---|---|---|
| Age at sleep | Years | 51.5 (2.0)b |
| Length of menstrual cycle | days | 25.9 (6.8)b |
| BMI:Body mass index | Kg/m2 | 27.6 (8.9) |
| AHI: Apnea-hypopnea Index | Events/hour | 4.7 (9.8) |
| N (%) | ||
| Site | Detroit area, MI | 34 (20.9%) |
| Chicago, IL | 33 (20.3%) | |
| Oakland, CA | 50 (30.7%) | |
| Pittsburgh, PA | 46 (28.2%) | |
| Race/Ethnicity | African American | 58 (35.6%) |
| Chinese | 27 (16.6%) | |
| White | 78 (47.9%) | |
| Financial Strain (How hard paying for basics) | Very hard | 7 (4.3%) |
| Somewhat hard | 40 (24.5%) | |
| Not hard | 116 (71.2%) | |
| Obesity Status | BMI<30 | 101 (62.0%) |
| BMI>=30 | 62 (38.0%) | |
| Marital Status | Single | 24 (14.7%) |
| Married | 101 (62.0%) | |
| Not married | 38 (23.3%) | |
| Alcohol consumption(cups)c | None | 137 (84.1%) |
| Any | 26 (15.9%) | |
| Caffeine consumption(cups)c | None | 33 (20.3%) |
| Any | 130 (79.7%) | |
| Smoking frequencyc | None | 147 (90.2%) |
| Any | 16 (9.8%) |
a
IQR: interquartile range
b
The statistics is mean (standard deviation)
c
Variables from sleep daily diaries