Table:
Socioeconomic factors	ORa (95% CI)Model 1b	AOR (95% CI)Model 2c	AOR (95% CI)Model 3d
Education
Illiteracy and primary	2.9 (1.1–7.6)	2.0 (0.5–7.8)	1.6 (0.4–6.2)
Secondary and higher	1.00	1.00	1.00
Family income
Low	3.4 (1.3–9.0)	1.1 (0.2–4.9)	1.4 (0.3–5.7)
Medium and high	1.00	1.00	1.00
Nationality	–
Afghan	6.3 (1.7–23.9)	4.4 (1.1–18.2)
Iranian	1.00	1.00
Insurance	0.2 (0.1–0.6)	–	–
Insurance-nationality	–
Uninsured Afghan	7.3 (1.9–28.3)	5.1 (1.2–22.6)
Uninsured Iranian	2.0 (0.5–7.9)	1.7 (0.4–7.1)
Insured Iranian	1.00	1.00

Parse the following content of the table in markdown code: | Socioeconomic factors | ORa (95% CI)Model 1b | AOR (95% CI)Model 2c | AOR (95% CI)Model 3d | 
 | --- | --- | --- | --- | 
 | <COLSPAN=4> Education | 
 | Illiteracy and primary | 2.9 (1.1–7.6) | 2.0 (0.5–7.8) | 1.6 (0.4–6.2) | 
 | Secondary and higher | 1.00 | 1.00 | 1.00 | 
 | <COLSPAN=4> Family income | 
 | Low | 3.4 (1.3–9.0) | 1.1 (0.2–4.9) | 1.4 (0.3–5.7) | 
 | Medium and high | 1.00 | 1.00 | 1.00 | 
 | Nationality |  |  | – | 
 | Afghan | 6.3 (1.7–23.9) | 4.4 (1.1–18.2) |  | 
 | Iranian | 1.00 | 1.00

|  | 
 | Insurance | 0.2 (0.1–0.6) | – | – | 
 | Insurance-nationality |  | – |  | 
 | Uninsured Afghan | 7.3 (1.9–28.3) |  | 5.1 (1.2–22.6) | 
 | Uninsured Iranian | 2.0 (0.5–7.9) |  | 1.7 (0.4–7.1) | 
 | Insured Iranian | 1.00 |  | 1.00 |