Table 2. Prevalence for the use of at least one drug by self-medication, according to demographic and socioeconomic aspects by geographic region. PNAUM, Brazil, 2014a. (N = 40,833).

Variable	Self-medication prevalence
	North		Northeast		Southeast		South		Midwest
	%	95%CI	%	95%CI	%	95%CI	%	95%CI	%	95%CI
Gender
Female	19.2	15.9–23.0	27.5	25.1–30.0	15.3	13.0–18.0	13.1	11.6–14.8	22.9	20.3–25.6
Male	16.3	13.4–19.6	19.6	16.9–22.6	9.9	7.8–12.4	9.5	8.1–11.2	15.5	13.1–18.4
Age group (years)
0-9	10.9	8.1–14.5	11.9	9.2–15.2	2.5	1.4–4.3	3.6	2.3–5.6	8.7	6.5–11.5
10-19	15.5	10.8–21.7	19.6	15.6–24.3	9.3	6.7–12.8	5.6	3.7–8.2	17.0	12.6–22.7
20-39	23.1	19.5–27.0	31.2	27.5–35.2	17.4	14.4–20.9	15.1	12.8–17.8	24.3	20.9–28.0
40-59	18.9	15.4–22.9	25.6	23.1–28.3	14.8	12.3–17.7	14.8	12.0–15.8	20.0	17.7–22.5
≥ 50	14.3	11.9–17.1	21.4	18.8–24.2	11.3	9.3–13.7	11.9	10.0–14.1	19.6	16.9–22.6
Education (years)
0-8	17.3	14.3–20.7	21.8	19.6–24.3	11.0	9.2–13.0	10.5	9.1–12.1	18.0	15.8–20.5
9-11	19.9	16.1–24.3	29.4	23.7–31.4	16.0	13.2–19.4	13.1	11.0–15.6	20.5	17.9–23.3
≥ 12 years	16.1	10.9–23.2	32.9	28.1–38.2	16.1	12.1–21.0	13.5	10.4–17.4	22.7	18.2–28.0
Economic classificationb
A/B	17.7	13.1–23.5	26.6	20.8–32.6	15.0	12.1–18.6	12.2	10.3–14.4	20.5	17.2–24.3
C	18.8	15.6–22.5	24.5	21.9–27.4	12.6	10.5–15.0	11.3	9.7–13.1	19.0	17.0–21.2
D/E	15.7	12.5–19.6	22.2	19.7–24.9	10.1	7.7–13.1	10.1	7.5–13.7	18.0	14.5–22.0

^a Percentages adjusted for sample weights and post-stratified according to age and gender.

^b According to the 2013 Brazilian Economic Classification Criterion of the Brazilian Association of Research Companies (www.abep.org).