Twin Pregnancy in Brazil: A Profile Analysis Exploring Population Information from the National Birth E-Registry on Live Births

Table 1

Prevalence of twin pregnancies in Brazil according to regions and states, Brazil, SINASC 2011-2014.

Regions and states	Twin pregnancy	Single pregnancy	Cramer V
	n (%)	n (%)
Midwestern region	10 581 (1.14)	914 414 (98.86)	0.0075
Federal District	2 572 (1.28)	197 913 (98.72)		0.839
Mato Grosso	2 322 (1.11)	207 046 (98.89)		0.762
Mato Grosso do Sul	1 752 (1.04)	166 501 (98.96)		0.766
Goiás	3 935 (1.13)	342 954 (98.87)		0.750
Northeast region	34 077 (1.03)	3 258 671 (98.97)	0.0071
Alagoas	1 954 (0.95)	204 121 (99.05)		0.667
Bahia	9 088 (1.12)	803 939 (98.88)		0.703
Ceará	4 917 (0.98)	497 924 (99.02)		0.716
Maranhão	4 236 (0.92)	454 561 (99.08)		0.678
Paraíba	2 427 (1.07)	224 127 (98.93)		0.701
Pernambuco	6 146 (1.09)	556 947 (98.91)		0.709
Piauí	1 959 (1.01)	192 413 (98.99)		0.678
Rio Grande do Norte	1 900 (1.01)	186 719 (98.99)		0.717
Sergipe	1 450 (1.04)	137 940 (98.96)		0.681
North region	10 726 (0.86)	1 230 415 (99.14)	0.0058
Acre	645 (0.93)	68 405 (99.07)		0.719
Amazonas	2 505 (0.81)	306 891 (99.19)		0.709
Amapá	543 (0.85)	63 058 (99.15)		0.747
Pará	4 756 (0.86)	548 027 (99.14)		0.675
Rondônia	1 042 (0.97)	106 712 (99.03)		0.715
Roraima	319 (0.76)	41 755 (99.24)		0.732
Tocantins	916 (0.95)	95 567 (99.05)		0.732
Southeast region	56 167 (1.23)	4 512 604 (98.77)	0.0037
Espírito Santo	2 517 (1.18)	210 847 (98.82)		0.771
Minas Gerais	12 683 (1.23)	1017 576 (98.77)		0.769
Rio de Janeiro	10 278 (1.15)	879 631 (98.85)		0.778
São Paulo	30 689 (1.26)	2 404 550 (98.74)		0.819
South region	18 450 (1.21)	1 505 602 (98.79)	0.0050
Paraná	7 220 (1.18)	607 078 (98.82)		0.790
Rio Grande do Sul	7 118 (1.28)	547 985 (98.72)		0.779
Santa Catarina	4 112 (1.16)	350 539 (98.84)		0.813
Total	130 001 (1.13)	11 421 706 (98.87)	0.0116	0.761

Ranking of HDI-2014.