| Variable | Operational Definition | Instrument of Data Collection |
| Gender (SEX) | Male/Female | General Survey |
| Marital Status (MASTAT) | Married/in couple, Single, Separated/Divorced | General Survey |
| Living arrangements (LA) | with couple, alone (solitary), with children or relatives | General Survey |
| Socioeconomic structural conditions -basic need unsatisfied (BNU) | 5 concepts: home services, overcrowding, school attendance, unemployment, education | General Survey |
| Income Level-Financial situation now (FISIT) | Family income able to reach the total cost of all essential resources | General Survey |
| Highest Educational Level Achieved (HELA) | Basic Education, High School and University-Tertiary | General Survey |
| Employment status (ESTAT) | Employed or unemployed | General Survey |
| Insurance Status (IS) | Presence of Health Coverage | General Survey |
| Distance to Health Institution (DHI) | distance from homes to a health care center (km) | General Survey |
| Perceived health status (PHS) | very bad, bad, fair, good, very good, excellent | Illness Perception Questionnaire (IPQ) |
| Disease Perception (DP) | Yes or No | Illness Perception Questionnaire (IPQ) |
| Cognitive components of illness perception (CCHIP) | Identity, cause, time-line, consequences, cure/control | Illness Perception Questionnaire (IPQ) |
| Healthcare seeking behavior (HCB) | Appropriate or inappropriate | Illness Perception Questionnaire (IPQ) |
| Disease detected | CIE-10 disease description | IPQ and basic health examination |