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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).