Table 2.

Unadjusted associations between study variables and mistimed and unwanted pregnancy. Birth in Brazil, 2011/2012

Variable	Mistimed (a)		Unwanted (a)
	OR	95 % CI	OR	95 % CI
Sociodemographic variables
Maternal age (years)
< 20	1.76	1.57–1.98	1.48	1.32–1.67
35 and over	0.45	0.39–0.52	1.09	0.97–1.24
20 to 34	1	-	1	-
Schooling level
≤ 7 years	1.21	1.05–1.39	3.37	2.94–3.88
8 to 11 years	1.32	1.16–1.50	2.29	2.01–2.62
12 or more years	1		1
Skin color
White	1	-	1	-
Black	1.19	1.00–1.42	1.75	1.49–2.06
Brown	1.26	1.15–1.40	1.49	1.35–1.65
Yellow	1.66	1.14–2.42	1.67	1.18–2.32
Individual variables
Marital status
With partner	1	-	1	-
Without partner	2.42	2.04–2.87	4.17	3.59–4.85
Has paid work
Yes	1	-	1	-
No	1.39	1.26–1.53	1.60	1.46–1.75
Alcohol use
No	1	-	1	-
Yes, but with no alcoholism risk	1.04	0.83–1.31	1.22	0.98–1.52
Yes, with alcoholism risk	1.40	1.17–1.67	1.87	1.64–2.14
Tobacco use
No	1	-	1	-
Yes	1.01	0.86–1.18	2.26	1.98–2.57
Parity
Primiparous	1	-	1	-
1	0.97	0.87–1.09	1.59	1.41–1.80
2	1.02	0.88–1.16	3.92	3.34–4.60
3 or more	1.16	0.96–1.40	7.51	6.35–8.88
Adverse obstetric outcomes in previous pregnancyb
Neonatal death
No	1		1
Yes	0.61	0.46–0.81	0.61	0.48–0.76
Stillbirth
No	1		1
Yes	0.86	0.63–1.16	0.90	0.69–1.17
Preterm birth (GA < 37 weeks)
No	1		1
Yes	1.05	0.80–1.29	1.44	1.23–1.69
Low birth weight (BW < 2500 g)
No	1		1
Yes	0.95	0.80–1.14	1.37	1.18–1.59
Maternal complicationsb
No	1		1
Yes	0.95	0.81–1.12	1.22	1.04–1.42

GA gestational age, BW birth weight

(^a) Reference category: intended pregnancy

^bExcluding primiparous women

^cComplications in previous pregnancy (eclampsia, high blood pressure, uterine rupture or diabetes)