Table 3. Contraceptive knowledge and use of safe method in women, according their history of IA.

Variables	Subcategories	Women with one or more IAs during their life	Women with no IA during their life	“p-value”
Perceived knowledge:	-%women who claim to have sufficient information about contraceptive methods	61.1 (49.1–73.1)	58.8 (47.8–69.9)	0.771
Real knowledge:	-% women who have acceptable real knowledge of contraceptive methods (valid answers to the 4 questions)	16.9 (7.9–25.9)	31.1 (30.0–41.2)	0.033
	-Average number of questions with valid answers in relation to the 4 contraceptive methods evaluated	2.13 (1.85–2.41)	2.71 (2.48–2.94)	0.002
Use of safe method:	-%women who use a safe method in the last commercial relation	94.7 (87.1–98.5)	99.2 (95.9–99.9)	0.042
	-%women who use a safe method in the last private relation	75.4 (64.5–86.2)	82.7 (73.9–91.6)	0.268

95% CI in brackets.