Characteristics of the VA Normative Aging Study subjects at baseline and across all visits and distributions of the weather and outcome variables
| Baseline | All visits | |||||
|---|---|---|---|---|---|---|
| Variable | N | Mean | SD | N | Mean | SD |
| Ventricular episodes (VE) | 701 | 4.98 | 17.93 | 1448 | 6.77 | 22.19 |
| Age (years) | 701 | 73.33 | 6.70 | 1448 | 75.31 | 6.77 |
| BMI (kg/m2) | 701 | 28.23 | 4.05 | 1448 | 28.14 | 4.24 |
| Pack-years of cigarettes smoked | 701 | 21.76 | 25.91 | 1448 | 20.53 | 24.64 |
| Temperature (°F) | 696 | 53.47 | 16.13 | 1443 | 53.32 | 16.29 |
| BC same day (μg/m3) | 596 | 0.62 | 0.36 | 1190 | 0.56 | 0.33 |
| BC 2-day average (μg/m3) | 593 | 0.59 | 0.33 | 1187 | 0.53 | 0.30 |
| BC 3-day average (μg/m3) | 592 | 0.54 | 0.29 | 1186 | 0.48 | 0.27 |
| PM2.5 same day (μg/m3) | 616 | 12.34 | 7.00 | 1247 | 11.18 | 6.51 |
| PM2.5 2-day average (μg/m3) | 618 | 12.20 | 6.22 | 1251 | 11.09 | 5.68 |
| PM2.5 3-day average (μg/m3) | 618 | 11.88 | 5.43 | 1252 | 10.83 | 4.99 |
| N | (%) | N | (%) | |||
| VE 0/1 | 69 | 9.84 | 177 | 12.22 | ||
| Statin user | 289 | 41.23 | 737 | 50.9 | ||
| β-blocker | 259 | 36.95 | 583 | 40.26 | ||
| ACE | 227 | 32.38 | 525 | 36.26 | ||
| Ca | 122 | 17.4 | 312 | 21.55 | ||
| Diabetes | 135 | 19.3 | 305 | 21.3 | ||
| Obese (BMI≥30) | 189 | 26.96 | 390 | 26.93 | ||
| Take two or more drinks a day | 130 | 18.5 | 262 | 18.1 | ||
| GSTM1 (no deletion) | 303 | 46.76 | 649 | 47.58 | ||
| GSTT1 (no deletion) | 483 | 80.23 | 1027 | 79.8 | ||
BC, black carbon; BMI, body mass index; GSTT1, glutathione S-transferase theta-1; GSTM1, glutathione S-transferase mu-1; VA, Veterans Affairs.