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Table 4 Linear regression results for importance of various forms of payment by sociodemographic characteristics, N = 292

From: Attitudes Toward Payment for Research Participation: Results from a U.S. Survey of People Living with HIV

  Model 12 Model 13 Model 14 Model 15 Model 16 Model 17 Model 18
Cash incentive Reimbursement for lost wages Compensation for time Transportation voucher Food Gifts Post-trial access to intervention
b CI b CI b CI b CI b CI b CI b CI
Age − .041* [− .080,− .001] − .013 [− .056, .031] − .043** [− .077, − .009] − .014 [− .059, .032] − .038† [− .081, .006] − .046* [− .088, − .005] .043† [− .001, .086]
Womana − .868* [− 1.591, − .145] − .310 [− 1.108, .487] − .436 [− 1.057, .184] .220 [− .613, 1.053] 1.014** [.217, 1.811] .233 [− .529, .994] .437 [− .352, 1.226]
Race-ethnicityb               
 Non-Hispanic Black − .095 [− 1.017, .827] .111 [− .906, 1.129] .283 [− .508, 1.074] .479 [− .583, 1.541] − .030 [− 1.046, .986] .850† [− .121, 1.821] − .739 [− 1.746, .267]
 Hispanic/other .671 [− .265, 1.607] − .110 [− 1.142, .922] .350 [− .452, 1.153] − .104 [− 1.182, .973] − 1.204* [− 2.235, − .173] .517 [− .469, 1.502] − .527 [− 1.548, .494]
< Bachelor’s degreec .337 [− .446, 1.119] 1.410*** [.547, 2.273] .064 [− .607, .735] .876† [− .025, 1.777] .382 [− .480, 1.245] − .377 [− 1.201, .447] .192 [− .662, 1.046]
< Full-time employedd .513 [− .423, 1.449] − 1.080* [− 2.113, − .047] − .067 [− .870, .736] − .394 [− 1.472, .684] − .180 [− 1.212, .851] − .247 [− 1.233, .739] − .134 [− 1.156, .888]
Census regione               
 Midwest .583 [− .441, 1.608] .391 [− .739, 1.522] .260 [− .619, 1.139] .931 [− .249, 2.111] 1.153* [.024, 2.282] .811 [− .268, 1.890] .688 [− .430, 1.806]
 Northeast .318 [− .593, 1.228] .162 [− .843, 1.167] .409 [− .373, 1.190] 1.431** [.382, 2.480] .388 [− .616, 1.391] .137 [− .823, 1.096] .035 [− .959, 1.029]
 West − .085 [− .967, .798] .725 [− .248, 1.699] .509 [− .249, 1.266] 1.137* [.120, 2.154] 1.075* [.103, 2.048] .729 [− .201, 1.658] .174 [− .789, 1.138]
Self-rated health .006 [− .013, .025] .009 [− .012, .029] .011 [− .005, .027] .004 [− .018, .025] − .009 [− .029, .012] .003 [− .017, .022] .017† [− .003, .039]
Constant 8.327*** [6.240, 10.413] 6.055*** [3.752, 8.357] 8.346*** [6.556, 10.136] 4.003*** [1.599, 6.406] 5.398*** [3.100, 7.697] 3.693*** [1.496, 5.890] 4.064*** [1.786, 6.341]
R2 .049 .053 .052 .046 .071 .058 .046
  1. b coefficient, CI confidence interval
  2. areference = man; breference = non-Hispanic White; creference = bachelor’s degree or higher; dreference = employed full-time; ereference = South
  3. †p < .10, *p < .05, **p < .01, ***p < .001
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