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Table 4 Self-perceived oral health regression results, controlling for oral health condition

From: Socioeconomic inequalities in self-perceived oral health among adults in Chile

  Heckman Two-step Ordered Model Sample Selection
Coef. p-value Coef. p-value
Sex −2.977 0.009 −0.202 0.067
Age (base: 18–30)
 31–40 0.762 0.538 0.021 0.853
 41–50 0.854 0.526 0.016 0.884
 51–61 0.991 0.437 0.057 0.608
Head of household −1.079 0.573 −0.170 0.248
Married/partner −0.052 0.936 0.005 0.936
Children under 5 2.967 0.000 0.272 0.000
Children aged 5-18 0.559 0.097 0.050 0.031
Education (base: Middle or less)
 Incomplete high school −0.730 0.519 −0.102 0.317
 Complete high school −2.650 0.022 −0.281 0.002
 Higher Education −4.237 0.001 −0.402 0.001
Employed full time 1.121 0.283 0.125 0.133
Employed part time −0.973 0.267 −0.120 0.148
Public health system (base: Public Insurance A, most vulnerable)
 Public Insurance B −2.539 0.004 −0.249 0.000
 Public Insurance C −2.960 0.014 −0.318 0.000
 Public Insurance D −1.930 0.115 −0.213 0.005
 Public Insurance unknown category 5.534 0.620 0.583 0.097
Any frontal missing teeth 4.721 0.000 0.404 0.000
Caries (base: less than 6)
 6–11 1.784 0.036 0.165 0.005
 12 or more 7.032 0.001 0.607 0.000
Teeth lost by caries
 6–11 3.445 0.000 0.284 0.000
 12 or more 5.171 0.000 0.443 0.000
Malocclusion 1.291 0.078 0.121 0.055
Inverse Mills ratio (IMR) −3.782 0.131   
Observations 1,394   1,394  
LR test indep equations    4.21 0.04