Table 2.
Demographic Characteristics
| Control | Affected | |||
|---|---|---|---|---|
| Former (N = 555) | Current (N = 254) | Former (N = 501) | Current (N = 391) | |
| Age | 61.69 (10.60) | 53.66 (11.59) | 68.94 (9.21) | 61.44 (10.12) |
| Gender (M) | 289 (52%) | 91 (36%) | 279 (56%) | 197 (50.4%) |
| College Grad (Y) | 175 (32%) | 47 (19%) | 134 (27%) | 69 (18%) |
| Age of Smoking Initiation | 17.06 (3.95) | 17.00 (4.95) | 17.32 (4.40) | 16.56 (3.90)a |
| Smoking Duration | 26.38 (14.47) | 35.38 (11.76) | 39.48 (14.09) | 44.25 (10.33)a |
| Average CPD | 21.07 (14.72) | 20.67 (11.33) | 28.98 (14.88) | 27.98 (13.31)a |
| Years of Smoking Cessation | 20.54 (11.92) | 0.04 (0.16) | 17.22 (11.84) | 0.13 (0.22)b |
Demographic Characteristics of the study participants in the MGH lung cancer study. Entries are mean (SD) for continuous variables and count (percentage) for binary variables.
a
N = 389.
b
N = 384.