Table 3 Tobit regression model to show predictors of WTP for most preferred intervention
|  | Coefficient | Standard error | t | p > t | Lower 95% CI | Upper 95% CI | |
|---|---|---|---|---|---|---|---|
Intervention most preferred | Verbal | Reference | |||||
QLF | 4.87 | 2.63 | 1.85 | 0.066 | −0.32 | 10.06 | |
Traffic light | 9.65 | 3.81 | 2.53 | 0.012 | 2.15 | 17.15 | |
Deprivation (IMD decile) | 8–10 (high) | −7.14 | 3.10 | −2.31 | 0.022 | −13.24 | −1.04 |
4–7 (medium) | Reference | ||||||
1–3 (low) | −4.17 | 2.80 | −1.49 | 0.138 | −9.69 | 1.35 | |
Income per annum | £31,200+ | −2.40 | 2.90 | −0.83 | 0.409 | −8.11 | 3.32 |
£15,600–31,199 | Reference | ||||||
£0–15,599 | −5.03 | 2.90 | −1.74 | 0.083 | −10.71 | 0.655 | |
Gender | Female | 0.24 | 2.46 | 0.10 | 0.924 | −4.61 | 5.08 |
Male | Reference | ||||||
Education | University degree (high) | 0.05 | 3.30 | 0.01 | 0.988 | −6.46 | 6.56 |
A-levels (medium) | Reference | ||||||
GCSE or less (low) | 3.25 | 3.16 | 1.03 | 0.305 | −2.98 | 9.48 | |
Age | 18–34 years | −.75 | 3.04 | −0.25 | 0.806 | −6.73 | 5.24 |
34–64 years | Reference | ||||||
65+ years | −3.63 | 3.35 | −1.08 | 0.280 | −10.23 | 2.98 | |
Number of teeth | < 20 teeth | 6.94 | 3.51 | 1.98 | 0.049 | 0.032 | 13.85 |
20+ teeth | Reference | ||||||
Dental attendance | Infrequent (< 6 times in 5 years) | −0.45 | 3.02 | −0.15 | 0.881 | −6.41 | 5.50 |
Normal attender (6+ in 5 years) | Reference | ||||||
Literacy | Low REALM-R | −11.03 | 5.09 | −2.17 | 0.031 | −21.05 | −1.00 |
Normal/high REALM-R | Reference | ||||||
Practice | Practice 1 | 3.20 | 3.51 | 0.91 | 0.363 | −3.72 | 10.11 |
Practice 2 | 10.14 | 3.41 | 2.97 | 0.003 | 3.42 | 16.85 | |
Practice 3 | 2.76 | 3.80 | 0.73 | 0.468 | −4.72 | 10.24 | |
Practice 4 | Reference | ||||||
Constant | 8.42 | 4.84 | 1.74 | 0.083 | −1.10 | 17.95 | |