Table 4.

Crude estimated risk of maternal complications by age according to socio-demographic characteristics. DHS, Brazil, 2006.

			Age
Patient characteristics	15-19 years		20-34 years		@	35-49 years		@
	With complications	Without complications	With complications	Without complications	OR (95% CI)	With complications	Without complications	OR (95% CI)
Schooling, years (b)
Without/Fundamental	3	291	62	2,007	1.43 (0.67-3.02)	22	516	5.23 (1.40-19.58)
High School	0	116	24	1,553	1.00 (ref.)	8	334	1.00
Currently studying (c)
No	3	295	75	3,175	0.83 (0.30-2.29)	27	794	2.64 (0.44-15.75)
Yes	0	111	11	426	1.00 (ref.)	3	56	1.00
Marital status (d)
Without partner	0	111	18	589	1.33 (0.79-2.26)	4	119	0.95 (0.32-2.76)
With partner	3	296	68	2,969	1.00 (ref.)	26	731	1.00
Ethnicity/skin color (e)
White	0	111	26	1,251	1.00 (ref.)	8	353	1.00
Non white	3	291	58	2,274	1.16 (0.50-2.69)	22	484	1.03 (0.18-5.99)
Religion (f)
None	2	67	8	307	1.00 (ref.)	1	37	1.00
Some	1	340	78	3,251	1.01 (0.33-3.05)	29	811	8.39 (0.94-74.62)
Working in the last 12 months (g)
Yes	1	157	55	2,104	1.00 (ref.)	21	538	1.00
No	2	250	31	1,456	1.11 (0.52-2.36)	9	311	0.56 (0.12-2.53)
Residence (h)
Capital or big cities	1	125	28	1,130	0.90 (0.43-1.88)	11	252	1.06 (0.19-6.00)
Other	2	282	58	2,421	1.00 (ref.)	19	594	1.00
Region
N, NE, CW	2	278	58	2,197	1.34 (0.66-2.75)	17	405	0.75 (0.18-3.21)
SE, S	1	129	28	1,365	1.00 (ref.)	13	445	1.00
Number of live births
≥2	1	54	34	1,413	0.59 (0.30-1.14)	3	147	3.56 (0.71-17.96)
<2	2	353	52	2,149	1.00 (ref.)	27	703	1.00
Total women (a)	3	407	86	3,562		30	850

^@Three variables, weight, stratum and cluster (PSU), were considered in the analysis.