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Table 3 Multivariate models of the odds of consenting to therapy

From: Length of time periods in treatment effect descriptions and willingness to initiate preventive therapy: a randomised survey experiment

 

Crude

OR 95% CI

Model 1

OR 95% CI

Model 2

OR 95% CI

Model 3

OR 95% CI

Delay of Events (DoE)

Length of time delay

    

1 month (ref. cat.)

1

1

1

1

6 month

2.88** (2.11 to 3.95)

3.01** (2.17 to 4.16)

4.45** (2.72 to 7.30)

5.51** (2.47 to 12.30)

18 month

4.94** (3.50 to 6.97)

5.15** (3.62 to 7.33)

6.08** (3.61 to 10.23)

5.69** (2.44 to 13.27)

Demographic

Gender

    

Male (ref. cat.)

1

1

1

1

Female

1.11 (0.85 to 1.43)

1.02 (0.77 to 1.35)

0.87 (0.56 to 1.33)

0.87 (0.57 to 1.32)

Age group

    

under 60 years of age (ref. cat.)

1

1

1

1

60 years of age or older

1.80** (1.35 to 1.28)

1.64** (1.12 to 2.20)

1.34 (0.87 to 2.07)

1.45 (0.76 to 2.70)

Education level

    

University (ref. cat.)

1

1

1

1

Secondary school or equal

1.43* (1.06 to 1.93)

1.54** (1.12 to 2.12)

1.13 (0.70 to 1.83)

1.12 (0.69 to 1.81)

Compulsory school

2.28** (1.62 to 3.20)

2.19** (1.51 to 3.17)

1.87* (1.11 to 3.16)

1.89* (1.12 to 3.19)

History of cardiovascular diseases

History of heart attack or angina

    

No (ref. cat.)

1

 

1

1

Had heart attack and/or angina

3.47** (1.62 to 7.41)

 

2.89* (1.13 to 7.41)

2.86* (1.11 to 7.36)

Necessity concerns frameworka

Beliefs about medicine

    

Necessity

1.06** (1.03 to 1.10)

 

1.07** (1.03 to 1.11)

1.07** (1.03 to 1.11)

Concern

1.03 (0.99 to 1.07)

 

1.00 (0.95 to 1.05)

1.00 (0.95 to 1.05)

Interaction effectb

DoE 6 month × 60 years of age or older

0.98 (0.52 to 1.87)

  

0.71 (0.26 to 1.92)

DoE 18 month × 60 years of age or older

1.18 (0.58 to 2.39)

  

1.11 (0.38 to 3.22)

  1. Odds ratio (OR), significance level and confidence interval (CI) for willing to initiate therapy (0 = “no”, 1 = “yes”)
  2. aNecessity and concern was used in index form, ranging from 0 to 20
  3. bInteraction effects was adjusted for variables included in the interaction term
  4. * P ≤ 0.05, ** P ≤ 0.01 Model 1 = Length of time delay+demographics, Model 2 = Model 1 + History of cardiovascular diseases+Necessity concerns framework, Model 3 = Model 2+ interaction effect