Table 3.
Random parameter logit model output based on discrete choice experiment data
| Mean | SD | ||||||
|---|---|---|---|---|---|---|---|
| Attribute | Level | Estimate | SE | 95% CI | SD | SE | 95% CI |
| No treatment (opt-out) | −3.60*** | 0.18 | −3.95, −3.26 | 4.09*** | 0.22 | 3.66, 4.51 | |
| Chance of developing RA | −0.05*** | 0.00 | −0.06, −0.04 | 0.06*** | 0.00 | 0.05, 0.07 | |
| Mode of administration | Tablet (reference) | 0.56*** | 0.05 | 0.46, 0.66 | |||
| Injection | −0.09*** | 0.03 | −0.15, −0.04 | 0.54*** | 0.03 | 0.47, 0.60 | |
| Infusion | −0.47*** | 0.04 | −0.55, −0.39 | 0.81*** | 0.04 | 0.73, 0.89 | |
| Frequency of administration | 0.21*** | 0.03 | 0.17, 0.26 | 0.35*** | 0.03 | 0.29, 0.42 | |
| Chance of mild side effects | 2% (ref) | 0.10*** | 0.02 | 0.05, 0.14 | |||
| 5% | 0.06*** | 0.02 | 0.02, 0.09 | 0.15*** | 0.04 | 0.07, 0.23 | |
| 10% | −0.15*** | 0.02 | −0.20, −0.10 | 0.27*** | 0.03 | 0.20, 0.33 | |
| Chance of serious infection | −0.14*** | 0.02 | −0.18, −0.11 | 0.15*** | 0.01 | 0.13, 0.18 | |
| Chance of serious side effects | 1 in 100,000 (ref) | 0.33*** | 0.03 | 0.27, 0.40 | |||
| 20 in 100,000 | −0.11*** | 0.02 | −0.15, −0.06 | 0.08 | 0.12 | −0.16, 0.32 | |
| 100 in 100,000 | −0.23*** | 0.03 | −0.29, −0.16 | 0.61*** | 0.03 | 0.54, 0.68 | |
| Chance of developing RA × risk of serious infection | 0.002*** | 0.00 | 0.00;0.00 | - | - | - | |
| Log likelihood | −11713.7 | ||||||
| AIC | 23469.5 | ||||||
| Pseudo R2 | 0.28 | ||||||
AIC Akaike information criterion, CI confidence interval, RA rheumatoid arthritis, SD standard deviation, SE standard error, ***p < 0.001