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Table 1 Selected Variables

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

Variable Definition
Dependent variable
 OHIP-14 score Self-rated oral-health related quality of life (0 to 56; higher scores indicate a worse perceived oral health status)
Independent variables
Socioeconomic and demographic characteristics
 Sex Sex: male = 1 and female = 0
 Age Participant’s age in years at the time of the baseline survey
  18–30 Age between 18 and 30 years: yes = 1 and no = 0
  31–40 Age between 31 and 40 years: yes = 1 and no = 0
  41–50 Age between 41 and 50 years: yes = 1 and no = 0
  51–61 Age between 51 and 61 years: yes = 1 and no = 0
 Head of household Whether participant is head of his/her household: yes = 1 and no = 0
 Married/partner Marital status of participant (married or living with partner): yes = 1 and no = 0
 Children under 5 Number of children under age 5 living in the household
 Children aged 5–18 Number of children between ages 5 and 18 living in the household
 Education Highest educational level attained by participant
  Middle or less 8th grade or less: yes = 1 and no = 0
  Incomplete secondary school Between 8th and 11th grade: yes = 1 and no = 0
  Complete secondary school 12th grade: yes = 1 and no = 0
  Higher Education At least some higher education: yes = 1 and no = 0
 Employed full time Participant works full time: yes = 1 and no = 0
 Employed part time Participant works part time: yes = 1 and no = 0
 Healthcare system Health plan within the Public Insurance system
  Public Insurance A (most vulnerable) Public insurance plan A: yes = 1 and no = 0
  Public Insurance B Public insurance plan B: yes = 1 and no = 0
  Public Insurance C Public insurance plan C: yes = 1 and no = 0
  Public Insurance D (least vulnerable) Public insurance plan D: yes = 1 and no = 0
  Public Insurance unknown category Public insurance plan unknown: yes = 1 and no = 0
Clinically assessed oral health
 Any front missing teeth At least one front missing tooth: yes = 1 and no = 0
 Caries Number of caries
  Less than 6 Less than 6 caries: yes = 1 and no = 0
  6–11 6 to 11 caries: yes = 1 and no = 0
  12 or more 12 caries or more: yes = 1 and no =0
 Teeth lost due to caries Number of teeth lost because of dental caries
  Less than 6 Less than 6 teeth lost: yes = 1 and no = 0
  6–11 6 to 11 teeth lost: yes = 1 and no = 0
  12 or more 12 teeth lost or more: yes = 1 and no =0
 Malocclusion Occlusion problems: yes = 1 and no = 0
Instrumental variables
 Distance to subway Whether there is a subway station within a 2 km radius from the municipality’s population centroid where participant resides: yes = 1 and no = 0
 Travel time to campus Travel time in minutes from the municipality’s population centroid where the participant resides to the University Campus
  Tertile 1 20 min or less: yes = 1 and no = 0
  Tertile 2 Between 20 and 37 min: yes = 1 and no = 0
  Tertile 3 37 min or more: yes = 1 and no = 0
Other variables of interest
Oral health and behaviour
  Any missing teeth At least one missing tooth: yes = 1 and no = 0
  Any caries At least one caries (treated or untreated): yes = 1 and no = 0
  Prosthetic need Clinically assessed prosthetic need (upper and/or lower): yes = 1 and no = 0
  Reported daily tooth brushing frequency Number of times a day the participant brushes teeth
  Dental visit within past year At least one dental care visit within the past 12 months: yes = 1 and no = 0
  Bad or regular self-rated oral health Bad or regular self-rated oral health: yes = 1 and no = 0
 Rosenberg self-esteem scale Global self-worth scale (10 to 40; higher values indicate higher global self-esteem)