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Table 1 Age, gender, and race distribution of sample population
| 2 × 2 Factorial Design | |||||
|---|---|---|---|---|---|
| Overall | 2 page/Letter | 2 page/Postcard | 4 page/Letter | 4 page/Postcard | |
| Overall (N) | 780 | 188 | 191 | 199 | 202 |
| Gender | |||||
| Female | 392 (50.3) | 96 (51.1) | 97 (50.8) | 101 (50.8) | 98 (48.5) |
| Male | 388 (49.7) | 92 (48.9) | 94 (49.2) | 98 (49.2) | 104 (51.5) |
| Age | |||||
| 25 - 29 | 114 (14.6) | 24 (12.8) | 31 (16.2) | 24 (12.1) | 35 (17.3) |
| 30 - 39 | 199 (25.5) | 50 (26.6) | 49 (25.6) | 52 (26.1) | 48 (23.8) |
| 40 - 49 | 211 (27.1) | 49 (26.1) | 49 (25.6) | 61 (30.6) | 52 (25.7) |
| 50 - 59 | 187 (24.0) | 47 (25.0) | 48 (25.1) | 45 (22.6) | 47 (23.3) |
| 60 - 65 | 69 (8.8) | 18 (9.6) | 14 (7.3) | 17 (8.5) | 20 (9.9) |
| Mean (SD) | 43.8 (11.2) | 44.3 (11.3) | 43.3 (11.1) | 43.9 (10.9) | 43.8 (11.6) |
| Race | |||||
| White | 582 (74.6) | 140 (74.5) | 151 (79.1) | 147 (73.9) | 144 (71.3) |
| Non-white * | 58 (7.4) | 17 (9.0) | 10 (5.2) | 15 (7.5) | 16 (7.9) |
| Unknown/Other | 140 (18.0) | 31 (16.5) | 30 (15.7) | 37 (18.6) | 42 (20.8) |
