Table 1.
Mixed logit analysisa,b.
|
|
Mean | SD | ||||||||
|
|
Coefficient (95% CIb) | P value | Coefficient (95% CI) | P value | ||||||
| Left | 0.13 (0.06 to 0.12) | <.001 | —c | — | ||||||
| Opt-out | −1.74 (−1.93 to −1.55) | <.001 | 3.86 (3.67 to 4.05) | <.001 | ||||||
| Procedure | ||||||||||
|
|
Colonoscopy | −0.73 (−0.90 to −0.57) | <.001 | 0.98 (0.85 to 1.12) | <.001 | |||||
|
|
CTd colonography | −0.75 (−0.91 to −0.60) | <.001 | 0.65 (0.51 to 0.80) | <.001 | |||||
|
|
Stool-based (2 days) | 0.00 (Reference) | — | 0.00 (Reference) | — | |||||
|
|
Stool-based (1 day) | 0.27 (0.10 to 0.45) | <.001 | 0.93 (0.71 to 1.16) | <.001 | |||||
|
|
Blood-based | 0.40 (0.24 to 0.55) | <.001 | 0.91 (0.76 to 1.05) | <.001 | |||||
| Pain level | ||||||||||
|
|
No pain | 0.00 (Reference) | — | 0.00 (Reference) | — | |||||
|
|
Mild pain | −0.54 (−0.64 to −0.45) | <.001 | 0.26 (0.11 to 0.40) | <.001 | |||||
| Sensitivity (%) | ||||||||||
|
|
100 | 1.63 (1.52 to 1.75) | <.001 | 0.09 (−0.05 to 0.24) | 0.19 | |||||
|
|
95 | 0.70 (0.59 to 0.82) | <.001 | 0.02 (−0.13 to 0.18) | 0.79 | |||||
|
|
80 | 0.00 (Reference) | — | 0.00 (Reference) | — | |||||
|
|
60 | −1.26 (−1.43 to −1.08) | <.001 | 1.74 (1.53 to 1.95) | <.001 | |||||
| Recommendation | ||||||||||
|
|
Health Promotion Board | 0.88 (0.77 to 1.00) | <.001 | 0.11 (−0.04 to 0.25) | .16 | |||||
|
|
Doctors | 0.68 (0.56 to 0.80) | <.001 | 0.01 (−0.14 to 0.17) | .86 | |||||
|
|
Family or friends | 0.35 (0.23 to 0.48) | <.001 | 0.21 (0.05 to 0.36) | .008 | |||||
|
|
Neither | 0.00 (Reference) | — | 0.00 (Reference) | — | |||||
| Cost (Singapore $e) | ||||||||||
|
|
0 | 0.00 (Reference) | — | 0.00 (Reference) | — | |||||
|
|
5 | −0.35 (−0.50 to −0.19) | <.001 | 0.38 (0.16 to 0.59) | <.001 | |||||
|
|
30 | −0.81 (−0.93 to −0.69) | <.001 | 0.08 (−0.09 to 0.25) | .35 | |||||
|
|
400 | −2.39 (−2.53 to −2.25) | <.001 | 0.46 (0.30 to 0.62) | <.001 | |||||
|
|
1000 | −3.88 (−4.07 to −3.68) | <.001 | 1.53 (1.33 to 1.73) | <.001 | |||||
| Risk of test | ||||||||||
|
|
No risk | 0.00 (Reference) | — | 0.00 (Reference) | — | |||||
|
|
1% risk of adverse event | −0.74 (−0.86 to −0.62) | <.001 | 0.05 (−0.11 to 0.21) | .53 | |||||
aLog-likelihood: −8353, Akaike information criteria: 16,777, and Bayesian information criteria: 17,054.
bMean refers to the population mean. SD measures the individual preference heterogeneity. A significant value means that the preference for the corresponding level is heterogeneous at the individual levels.
cNot applicable.
dCT: computed tomography.
eSingapore $1=approximately US $0.75.