Table 3. Determinants of catastrophic health expenditures, 2015 .
| Variables | OR | Confidence Interval (95%) | p | |
| Highest | Lowest | |||
| Level of education | ||||
| Illiterate (Reference Category) | 1 | - | - | |
| Primary and Middle school | 0.84 | 0.51 | 2.21 | 0.212 |
| High school, Diploma and University | 0.46 | 1.24 | 2.61 | 0.012 |
| Household’s economic status * | ||||
| Fifth quintile (Reference Category) | 1 | - | - | |
| Fourth quintile | 2.70 | 1.31 | 6.02 | 0.025 |
| Third quintile | 4.38 | 3.02 | 9.92 | 0.029 |
| Second quintile | 5.40 | 3.81 | 12.91 | 0.036 |
| First quintile (poorest) | 7.21 | 4.41 | 15.45 | 0.041 |
| Supplementary insurance status | ||||
| Yes (Reference Category) | 1 | - | - | |
| No | 1.44 | 1.04 | 4.88 | 0.023 |
| Type of disease | ||||
| Dialysis (Reference Category) | 1 | - | - | |
| Multiple sclerosis | 2.10 | 1.38 | 4.22 | 0.020 |
| Kidney Transplantation | 1.40 | 0.78 | 3.44 | 0.154 |
| Family member with a special disease | ||||
| 1 member (Reference Category) | 1 | - | - | |
| More than 1 member | 5.50 | 1.33 | 19.11 | 0.048 |
| Residence | ||||
| Urban (Reference Category) | 1 | - | - | |
| Rural | 1.90 | 0.83 | 4.61 | 0.118 |
| Frequent use of inpatient services | 1.70 | 1.11 | 2.39 | 0.011 |
| Use of dental care | ||||
| No (Reference Category) | 1 | - | - | |
| Yes | 2.34 | 1.51 | 4.76 | 0.036 |
| Use of rehabilitation services | ||||
| No (Reference Category) | 1 | - | - | |
| Yes | 2.33 | 1.46 | 5.77 | 0.042 |
| Constant | 0.02 | 0.007 | 0.016 | 0.031 |
| -2LL = 461.336a; Cox & Snell R square = 0.151; Nagelkerke R square= 0.261 | ||||
*Based on monthly total expenditure by the household