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Table 1 Distribution of cases and live births (LB) by cluster and according to geographical region of the country

From: Intraclass correlation coefficients in the Brazilian network for surveillance of severe maternal morbidity study

Region Center nc(or xα#) LB in the network LB in Brazil*
Southeast n se = 2,794 (29.2%) 1 48 37,865 (46.1%) 1,130,407 (38.5%)
2 59
3 66
4 74
5 96
6 112
7 154
8 155
9 172
10 186
11 253
12 369
13 1050
Northeast n ne = 5,148 (53.9%) 1 118 33,172 (40.4%) 888,268 (30.3%)
2 210
3 263
4 281
5 294
6 465
7 566
8 920
9 945
10 1086
South n s = 939 (9.8%) 1 98 4,532 (5.5%) 371,497 (12.7%)
2 841
Midwest n mw = 609 (6.4%) 1 609 2,527 (3.1%) 222,658 (7.6%)
North n n = 65 (0.7%) 1 65 4,048 (4.9%) 321,998 (11.0%)
Total (n) 27 9555 82,144 2,934,828
  1. Mean cluster size (na)= 354.
  2. #Denominator of the expression of the ratio estimator.
  3. *Data from SINASC (Brazil, 2011) [16].