Table 1. Mean DMFT (absolute value) and mean number of decayed teeth (relative value to the overall mean) in adolescents aged 15–19 years, according to socioeconomic variables and year of the survey.

	n	DMFT		Decayed teeth
		Average	95%CI	Average	95%CI
Family income (minimum wages – MW)
2003
More than 5 minimum wages	5,298	5.29	4.85–5.74	1.81	1.55–2.08
3 to 5 MW	3,724	5.65	5.19–6.10	2.54	2.28–2.80
1 to 2 MW	3,546	5.98	5.47–6.50	3.08	2.78–3.37
Less than 1 MW	3,955	5.29	4.9–5.68	2.88	2.56–3.2
2010
Greater than 5 MW	665	3.04	2.36–3.72	0.65	0.44–0.86
3 to 5 MW	920	3.61	2.99–4.24	1.06	0.80–1.32
1 to 2 MW	2.621	4.47	4.04–4.91	1.85	1.55–2.15
Less than 1 MW	846	5.36	4.51–6.21	2.86	2.19–3.52
2023
Greater than 5 MW	343	2.77	1.45–4.09	0.35	0.16–0.53
3 to 5 MW	689	1.96	1.15–2.76	0.60	0.33–0.86
1 to 2 MW	2.563	3,57	3.01–4.12	1.54	1.25–1.82
Less than 1 MW	1.416	3,74	3.15–4.33	2.26	1.86–2.66
Educational level (age-grade distortion)
2003
Above	3,054	4.94	4.49–5.39	1.60	1.34–1.85
Ideal level	5,451	5.21	4.79–5.63	1.93	1.69–2.17
1-2 years	3,509	5.74	5.32–6.16	3.00	2.72–3.28
3 or more years	4,008	6.43	6.03–6.84	3.59	3.26–3.91
2010
Above	1,398	3.23	2.76–3.70	1.04	0.79–1.28
Ideal level	2,044	4.24	3.66–4.82	1.54	1.25–1.84
1-2 years	926	4.81	4.08–5.53	2.40	1.09–2.90
3 or more years	662	6.07	5.24–6.89	3.06	2.44–3.69
2023
Above	3,390	2.66	2.20–3.12	1.12	0.88–1.35
Ideal level	3,507	3.87	3.40–4.35	1.71	1.46–1.95
1–2 years	508	4.84	3.90–5.77	2.41	1.74–3.08
3 or more years	200	5.61	4.11–7.11	3.51	2.44–4.58