Multivariable Sensitivity Analysis Using Alternative Dichotomization Thresholds for Predictor Variables Related to Intention to Receive COVID-19 Within 3 Months of Regulatory Approval
| Alternative Dichotomization | Multivariable Odds Ratio (95% CI, P Value)* | |||||
|---|---|---|---|---|---|---|
| Concern† | Edu‡ | Health§ | Age | Sex (Men) | Influenza | Direct Interaction |
| – | – | – | 0.95 (0.90–1.00, .054) | 2.43 (2.00–2.95, <.001) | 2.35 (1.75-3.18, <.001) | 0.92 (0.79-1.07, .282) |
| – | – | Alt | 0.94 (0.89-1.00, .036) | 2.43 (2.01–2.95, <.001) | 2.34 (1.74-3.16, <.001) | 0.93 (0.80–1.08, .341) |
| – | Alt | – | 0.97 (0.92–1.02, .284) | 2.47 (2.04-3.00, <.001) | 2.34 (1.74-3.16, <.001) | 0.91 (0.78-1.06, .212) |
| – | Alt | Alt | 0.97 (0.92–1.02, .230) | 2.47 (2.04-3.00, <.001) | 2.32 (1.72–3.14, <.001) | 0.92 (0.79-1.07, .256) |
| Alt | – | – | 0.95 (0.90–1.01, .080) | 2.60 (2.13-3.18, <.001) | 2.40 (1.77-3.26, <.001) | 0.88 (0.75-1.03, .108) |
| Alt | – | Alt | 0.95 (0.90–1.00, .055) | 2.60 (2.14-3.18, <.001) | 2.38 (1.76-3.24, <.001) | 0.89 (0.76-1.04, .137) |
| Alt | Alt | – | 0.98 (0.92–1.03, .366) | 2.64 (2.17-3.23, <.001) | 2.40 (1.77-3.26, <.001) | 0.87 (0.74-1.01, .075) |
| Alt | Alt | Alt | 0.97 (0.92–1.03, .299) | 2.65 (2.18-3.23, <.001) | 2.38 (1.75-3.23, <.001) | 0.88 (0.75-1.02, .096) |
| Alternative Dichotomization | Multivariable Odds Ratio (95% Cl, P Value)* | ||||
|---|---|---|---|---|---|
| Concern† | Edu‡ | Health§ | Concern | Education | Health |
| – | – | – | 2.40 (2.07-2.79, <.001) | 1.41 (1.21–1.65, <.001) | 0.85 (0.71–1.01, .065) |
| – | – | Alt | 2.37 (2.05-2.75, <.001) | 1.43 (1.23-1.67, <.001) | 0.80 (0.53-1.23, .305) |
| – | Alt | – | 2.40 (2.07-2.79, <.001) | 1.54 (1.25-1.91, <.001) | 0.84 (0.70–1.01, .057) |
| – | Alt | Alt | 2.38 (2.05-2.76, <.001) | 1.58 (1.28-1.95, <.001) | 0.78 (0.51–1.19, .237) |
| Alt | – | – | 4.00 (3.35-4.78, <.001) | 1.42 (1.21–1.66, <.001) | 0.85 (0.71–1.02, .073) |
| Alt | – | Alt | 3.96 (3.32–4.74, <.001) | 1.44 (1.23-1.68, <.001) | 0.80 (0.52–1.22, .288) |
| Alt | Alt | – | 4.01 (3.36-4.79, <.001) | 1.54 (1.24-1.92, <.001) | 0.84 (0.70–1.01, .062) |
| Alt | Alt | Alt | 3.97 (3.33-4.75, <.001) | 1.58 (1.27-1.95, <.001) | 0.77 (0.51–1.18, .222) |
CI, confidence interval; Edu, educational attainment; Alt, alternative.
↵* Boldface text indicates P < .05.
↵† Concern about becoming infected with COVID-19. Concern was reported on a 5-point Likert scale (extremely, moderately, somewhat, slightly, not at all). The original (–) threshold divides between moderately/somewhat. The alternative threshold divides between somewhat/slightly.
↵‡ Educational attainment was reported on a 6-point Likert scale (some high school, high school graduate, some college, college graduate, Master's degree and Doctoral/Professional degree). The original (–) threshold divides between College graduate/Master's degree. The alternative threshold divides between some college/college graduate.
↵§ Self-reported health status was reported on a 5-point Likert scale (excellent, very good, good, fair, poor). The original threshold (–) divides between very good/good. The alternative threshold divides between good/fair.