From: Socioeconomic inequalities in self-perceived oral health among adults in Chile
 | OLS | Heckman Two-step | Ordered Model | Ordered Model Sample Selection | ||||
---|---|---|---|---|---|---|---|---|
Coef. | p-value | Coef. | p-value | Coef. | p-value | Coef. | p-value | |
Sex | −3.991 | 0.000 | −2.433 | 0.042 | −0.351 | 0.000 | −0.092 | 0.411 |
Age (base: 18–30) | ||||||||
 31–40 | 3.912 | 0.001 | 2.807 | 0.029 | 0.338 | 0.000 | 0.144 | 0.197 |
 41–50 | 5.970 | 0.000 | 4.622 | 0.001 | 0.515 | 0.000 | 0.265 | 0.032 |
 51–61 | 7.219 | 0.000 | 6.429 | 0.000 | 0.637 | 0.000 | 0.447 | 0.000 |
Head of household | 1.522 | 0.038 | −1.506 | 0.456 | 0.161 | 0.008 | −0.270 | 0.049 |
Married/partner | −0.364 | 0.609 | −0.186 | 0.784 | −0.030 | 0.636 | −0.002 | 0.973 |
Children under 5 | 2.273 | 0.001 | 2.974 | 0.000 | 0.196 | 0.001 | 0.265 | 0.000 |
Children aged 5-18 | 0.253 | 0.327 | 0.498 | 0.161 | 0.016 | 0.497 | 0.047 | 0.053 |
Education (base: Middle or less) | ||||||||
 Incomplete secondary school | −1.184 | 0.217 | −2.162 | 0.069 | −0.113 | 0.182 | −0.231 | 0.004 |
 Complete secondary school | −3.455 | 0.001 | −4.749 | 0.000 | −0.320 | 0.001 | −0.450 | 0.000 |
 Higher Education | −6.031 | 0.000 | −7.206 | 0.000 | −0.536 | 0.000 | −0.623 | 0.000 |
Employed full time | 0.211 | 0.739 | 1.420 | 0.196 | 0.004 | 0.941 | 0.170 | 0.018 |
Employed part time | −1.018 | 0.251 | −1.425 | 0.124 | −0.116 | 0.130 | −0.154 | 0.048 |
Healthcare system (base: Public Insurance A, most vulnerable) | ||||||||
 Public Insurance B | −2.493 | 0.002 | −3.166 | 0.001 | −0.231 | 0.000 | −0.291 | 0.000 |
 Public Insurance C | −2.164 | 0.039 | −3.640 | 0.004 | −0.209 | 0.021 | −0.379 | 0.000 |
 Public Insurance D (least vulnerable) | −2.382 | 0.006 | −3.475 | 0.007 | −0.223 | 0.003 | −0.341 | 0.000 |
 Public Insurance unknown category | −2.131 | 0.172 | 3.431 | 0.771 | −0.262 | 0.053 | 0.518 | 0.204 |
Inverse Mills ratio (IMR) |  |  | −4.294 | 0.105 |  |  |  |  |
Constant | 32.623 | 0.000 | 42.148 | 0.000 | Â | Â | Â | Â |
Observations | 1,394 | Â | 1,394 | Â | 1,394 | Â | 1,394 | Â |
R-squared | 0.138 | Â | Â | Â | Â | Â | Â | Â |
LR test indep equations | Â | Â | Â | Â | Â | Â | 6.04 | 0.014 |