Table 2 Response rates overall and by design characteristics, by gender, race, and age
2 × 2 Factorial Design | |||||
|---|---|---|---|---|---|
Overall | Pages | Notification | |||
2 | 4 | Letter | Postcard | ||
Overall | 363 (46.5) | 169 (44.6) | 194 (48.4) | 179 (46.3) | 184 (46.8) |
Gender | |||||
Female | 212 (54.1) | 105 (54.4) | 107 (53.8) | 108 (54.8) | 104 (53.3) |
Male | 151 (38.9) | 64 (34.4) | 87 (43.1) | 71 (37.4) | 80 (40.4) |
P value† | < 0.0001 | 0.007 | 0.03 | 0.0006 | 0.01 |
Race | |||||
White | 306 (52.6) | 147 (50.5) | 159 (54.6) | 151 (52.6) | 155 (52.5) |
Non-white * | 14 (24.14) | 6 (22.2) | 8 (25.8) | 5 (15.6) | 9 (34.6) |
Unknown/Other | 43 (30.7) | 16 (26.2) | 27 (34.2) | 23 (33.8) | 20 (27.8) |
P value† | < 0.0001 | < 0.0001 | 0.0002 | < 0.0001 | 0.0003 |
Age | |||||
25 - 29 | 35 (30.7) | 12 (21.8) | 23 (39.0) | 12 (25.0) | 23 (34.8) |
30 - 39 | 81 (40.7) | 32 (32.3) | 49 (49.0) | 42 (41.2) | 39 (40.2) |
40 - 49 | 107 (50.7) | 51 (52.0) | 56 (49.6) | 57 (51.8) | 50 (49.5) |
50 - 59 | 103 (55.1) | 56 (59.0) | 47 (51.1) | 50 (54.4) | 53 (55.8) |
60 - 65 | 37 (53.6) | 18 (56.2) | 19 (51.4) | 18 (51.4) | 19 (55.9) |
P value† | 0.0002 | < 0.0001 | 0.63 | 0.008 | 0.04 |