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Table 6 Effect of respondent characteristics and initial bids on time-tradeoff amounts

From: Values for preventing influenza-related morbidity and vaccine adverse events in children

Variable Type of variable Impact on TTO 95 % CI P value
Independent variables:     
   TTO amounts1     
Dependent variables:     
Baseline2 Constant 0.5545 (0.2402, 1.2798) 0.1617
Age3     
   18–34 Binary 1.0385 (0.4904, 2.1994) 0.9200
   35–49 Binary 1.1698 (0.6299, 2.1723) 0.6137
   50–64 Binary 1.5448 (0.7921, 3.0129) 0.1959
Female Binary 0.8629 (0.5926, 1.2565) 0.4342
Education: Some college or less Binary 1.1579 (0.7537, 1.7789) 0.4966
Not married Binary 0.9204 (0.5815, 1.4569) 0.7188
Health (Worse than average) Binary 1.1043 (0.7343, 1.6606) 0.6279
No children under 18 in household Binary 0.7663 (0.4541, 1.2930) 0.3114
Version (initial bid)4     
   1 (1 week) 4 binary variables, one for each initial bid 2.8454 (1.7138, 4.7242) <0.0001
   2 (1 month)   1.3331 (0.7943, 2.2374) 0.2694
   3 (2 weeks)   1.4705 (0.8741, 2.4739) 0.1415
Income (less than 3X poverty level) Binary 1.0092 (0.5398, 1.8870) 0.9766
Number of disease experienced: None Binary (0 v. 1 or more) 1.2406 (0.7396, 1.9394) 0.3370
  1. 1 Independent variables included for each respondent were uncomplicated influenza in a 1-year-old, uncomplicated influenza in a 14 year-old, and anaphylaxis or Guillain-Barré syndrome. R-squared = 0.2194.
  2. 2 Baseline refers to a person over 65 years of age, male, college graduate, married, good health, with income three times or greater than poverty level, children under 18 living in the household, familiar with at least one of the conditions in the survey, and responding to survey version 4 (initial bid of 6 months).
  3. 3 Compared to 65 and over.
  4. 4 Compared to version 4 (initial bid of 6 months).