Table 3.
Multinomial logit model (MNL) results and willing to pay (WTP).
| Attribute | Level | Coefficients | SE | 95% CI | WTP CNY ¥ |
p-value | RI |
|---|---|---|---|---|---|---|---|
| Presbyopia correction | Trifocal | 0.353 | 0.053 | 0.249,0.458 | 34,962 | <0.001 | 27.48% |
| Bifocal | 0.346 | 0.058 | 0.234,0.463 | 34,723 | |||
| Monofocal | Ref. | ||||||
| Spherical aberration correction | Yes (Aspheric IOLs) | 0.410 | 0.031 | 0.349,0.473 | 27,248 | <0.001 | 16.12% |
| No (Spherical IOLs) | Ref. | ||||||
| Astigmatism correction | Yes (Toric IOLs) | 0.234 | 0.030 | 0.175,0.294 | 15,543 | <0.001 | 9.20% |
| No (Non-toric IOLs) | Ref. | ||||||
| Blue-blocking functionality | Yes | 0.032 | 0.032 | −0.031,0.097 | 2,145 | 0.377 | 1.25% |
| No | Ref. | ||||||
| Surgeon’s recommendation | With | 0.028 | 0.031 | −0.033,0.090 | 1899 | 0.377 | 1.10% |
| Without | Ref. | ||||||
| Probability of adverse visual phenomena | Increase risk by 1% | −0.006 | 0.002 | −0.012,-0.001 | −869.9 | 0.025 | 9.43% |
| Cost | CNY ¥1 increase | −0.00003 | 0.000009 | −0.00005, −0.00001 | – | 0.002 | 35.39% |
SE, standard error; 95% CI: 95% confidence intervals; RI, relative importance; CNY ¥: Chinese Yuan; Ref., reference.