Table 1.
Characteristics of study subjects
| PLCO (n = 1635) |
NHS (n = 2011) |
||||
|---|---|---|---|---|---|
| Controls | Cases | Controls | Cases | Overall | |
| n Male | 996 | 639 | 0 | 0 | 1,635 |
| n Female | 0 | 0 | 1,018 | 993 | 2,011 |
| Age groups (n) | |||||
| 43-56 | 255 | 172 | 219 | 214 | 860 |
| 57-61 | 98 | 43 | 378 | 370 | 889 |
| 62-65 | 248 | 153 | 252 | 247 | 900 |
| 66-74 | 395 | 271 | 169 | 162 | 997 |
| Mean Age (SD) | 63.8 (5.0) | 64.1 (4.9) | 58.6 (6.3) | 58.5 (6.4) | 60.8 (6.5) |
| Mean RTL (SD) | 2.58 (0.57) | 2.58 (0.55) | 2.80 (0.36) | 2.79 (0.35) | 2.70 (0.47) |
| Pack-years smoked* (n) | |||||
| 0 | 368 | 280 | 489 | 436 | 1573 |
| 1 - 9 | 123 | 81 | 172 | 171 | 547 |
| 10 - 29 | 220 | 137 | 174 | 195 | 726 |
| ≥30 | 277 | 133 | 166 | 181 | 757 |
|
| |||||
| Total n | 996 | 639 | 1,018 | 993 | 3646 |
n = number of individuals
SD = standard deviation
RTL = relative telomere length
*
Some individuals were missing smoking status information
PLCO = Prostate, Lung, Colon, Ovarian Cancer Cohort
NHS = Nurses' Health Study