Table 4.
Representativeness of Responders on Demographic Characteristics
| $2 incentive | $5 Incentive | ||||||
|---|---|---|---|---|---|---|---|
| Characteristics | Ancillary study population | $2 incentive population | 1st Mailing | 2nd Mailing | $5 incentive population |
1st Mailing | 2nd Mailing |
| (N = 1328) | (N = 665) | (N = 317) | (N = 435) | (N = 663) | (N = 383) | (N = 446) | |
| Age | xx | xx | xx | xx | |||
| < 50 | 32.30 (429) | 34.29 (228) | 23.03 (73) | 25.98 (113) | 30.32 (201) | 21.67 (83) | 22.65 (101) |
| 50-75 | 33.36 (443) | 33.53 (223) | 38.49 (122) | 36.55 (159) | 33.18 (220) | 36.03 (138) | 35.87 (160) |
| > 75 | 34.34 (456) | 32.18 (214) | 38.49 (122) | 37.47 (163) | 36.50 (242) | 42.30 (162) | 41.48 (185) |
| Race | xx | xx | xx | xx | |||
| Caucasian | 68.67 (912) | 68.57 (456) | 83.91 (266) | 81.84 (356) | 68.78 (456) | 81.46 (312) | 79.82 (356) |
| African American | 16.72 (222) | 15.79 (105) | 10.09 (32) | 12.64 (55) | 17.65 (117) | 13.58 (52) | 14.80 (66) |
| Other | 14.61 (194) | 15.64 (104) | 5.99 (19) | 5.52 (24) | 13.57 (90) | 4.96 (19) | 5.38 (24) |
| Sex | x | xx | xx | ||||
| Female | 16.42 (218) | 18.95 (126) | 12.62 (40) | 16.32 (71) | 13.88 (92) | 9.92 (38) | 10.54 (47) |
| Male | 83.58 (1110) | 81.05 (539) | 87.38 (277) | 83.68 (364) | 86.12 (571) | 90.08 (345) | 89.46 (399) |
| Marital Status | x | xx | xx | xx | |||
| Married/Living with Someone | 54.59 (725) | 54.44 (362) | 60.57 (192) | 60.23 (262) | 54.75 (363) | 66.06 (253) | 62.33 (278) |
| Not Married | 45.41 (603) | 45.56 (303) | 39.43 (125) | 39.77 (173) | 45.25 (300) | 33.94 (130) | 37.67 (168) |
| Charlson comorbidity score | |||||||
| 0 | 44.20 (587) | 46.17 (307) | 42.59 (135) | 42.53 (185) | 42.23 (280) | 38.64 (148) | 39.69 (177) |
| 1 | 21.39 (284) | 20.30 (135) | 18.93 (60) | 20.00 (87) | 22.47 (284) | 21.67 (83) | 22.20 (99) |
| 2+ | 34.41 (457) | 33.53 (223) | 38.49 (122) | 37.47 (163) | 35.29 (234) | 39.69 (152) | 38.12 (170) |
| Mental health diagnoses | |||||||
| No mental health diagnosis | 46.99 (624) | 46.32 (308) | 53.00 (168) | 50.11 (218) | 47.66 (316) | 51.70 (198) | 51.35 (229) |
| Substance abuse only | 8.73 (116) | 8.72 (58) | 7.57 (24) | 8.05 (35) | 8.75 (58) | 8.88 (34) | 8.97 (40) |
| Psychiatric only | 27.56 (366) | 28.27 (188) | 25.55 (81) | 28.05 (122) | 26.85 (178) | 25.85 (99) | 25.56 (114) |
| Dual diagnosis | 16.72 (222) | 16.69 (111) | 13.88 (44) | 13.79 (60) | 16.74 (111) | 13.58 (52) | 14.13 (63) |
| Rural/Urban Status | xx | xx | |||||
| Urban | 92.85 (1233) | 94.89 (631) | 92.43 (293) | 94.02 (409) | 90.80 (602) | 87.99 (337) | 88.34 (394) |
| Rural | 7.15 (95) | 5.11 (34) | 7.57 (24) | 5.98 (26) | 9.20 (61) | 12.01 (46) | 11.66 (52) |
x p < 0.10 from overall non-responder population
xx p < 0.05 from overall non-responder population