Table 1.
Selected age-standardized characteristics of the Nurses’ Health Study participants throughout follow-up 6/2000-5/2006
| Characteristic | Mean (SD) or % |
|---|---|
| Na | 108,767 |
| Person-yearsa | 628,186 |
| Age (in years)a | 69.0 (7.3) |
| Caucasian race | 94 |
| BMI (kg/m2) | 25.8 (7.4) |
| Average PM2.5 over the previous 12 months | |
| Spatio-temporal model | 12.0 (2.8) |
| Nearest USEPA monitor | 12.7 (3.1) |
| Smoking status | |
| Never | 44 |
| Former | 45 |
| Current | 10 |
| Pack-yearsb | 24.3 (21.8) |
| Physical activity (MET hr/week) | |
| <3 | 23 |
| 3 to <9 | 21 |
| 9 to <18 | 18 |
| 18 to <27 | 11 |
| > = 27 MET | 19 |
| Alternative Healthy Eating Index | 175 (95) |
| Hypertension | 53 |
| Hypercholesterolemia | 61 |
| Diabetes | 11 |
| Individual level SES | |
| RN degree | 73 |
| Housewife mother at age 16 | 64 |
| Professional or manager father at age 16 | 26 |
| Married | 64 |
| Husband’s education | |
| less than high school | 4 |
| high school | 26 |
| greater than high school | 35 |
| Census tract SES | |
| Median home value ($1,000) | 170.2 (124.9) |
| Median income ($1,000) | 63.4 (24.4) |
aValue not age adjusted.
bAmong ever smokers only.