Skip to main content

Table 4 Representativeness of Responders on Demographic Characteristics

From: A comparison of small monetary incentives to convert survey non-respondents: a randomized control trial

   $2 incentive $5 Incentive
Characteristics Ancillary study population $2 incentive population 1st Mailing 2ndMailing $5
incentive population
1stMailing 2ndMailing
  (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)
  1. x p < 0.10 from overall non-responder population
  2. xx p < 0.05 from overall non-responder population