Table 2 Characteristics of live births at term to women included in the 100 Million Brazilian cohort between 2001 and 2015 (N = 8,768,930)
Variables | Number of individuals with missing data (%) | Number of individuals (%) | LBW |
|---|---|---|---|
N (%) | |||
Birth weight | 8095 (0.1) | 322,905 (3.7) | |
Geographic region | 0 (0.0) | ||
South | 1,026,468 (11.7) | 39,022 (3.8) | |
North | 936,916 (10.7) | 32,677 (3.5) | |
Northeast | 3,476,068 (39.6) | 120,192 (3.5) | |
Southeast | 2,734,958 (31.2) | 110,157 (4.0) | |
Center-West | 594,520 (6.8) | 20,857 (3.5) | |
Area of residence | 362,277 (4.1) | ||
Urban | 6,207,608 (73.8) | 230,689 (3.7) | |
Rural | 2,199,045 (26.2) | 78,624 (3.6) | |
Domiciliary conditions | 653,514 (7.5) | ||
Appropriate | 2,364,963 (29.1) | 88,669 (3.8) | |
Intermediate | 3,251,882 (40.1) | 117,908 (3.6) | |
Inappropriate | 2,498,571 (30.8) | 92,577 (3.7) | |
Maternal race/ethnicity | 734,010 (8.4) | ||
White/Yellow (Asian descent) | 2,546,656 (31.7) | 90,139 (3.5) | |
Brown/Mixed-race | 4,758,109 (59.2) | 173,876 (3.7) | |
Black | 674,248 (8.4) | 29,540 (4.4) | |
Indigenous | 55,907 (0.7) | 2168 (3.9) | |
Marital status | 119,590 (1.4) | ||
Married, civil union | 3,988,512 (46.1) | 133,757 (3.4) | |
Single, divorced, widow | 4,660,828 (53.9) | 184,577 (4.0) | |
Maternal schooling (years) | 166,492 (1.9) | ||
≥ 8 | 5,108,896 (59.4) | 172,144 (3.4) | |
4 to 7 | 2,682,112 (31.2) | 107,450 (4.0) | |
1 to 3 | 673,458 (7.8) | 29,386 (4.4) | |
Illiterate | 137,972 (1.6) | 7437 (5.4) | |
Number of prenatal visits | 66,725 (0.8) | ||
7+ visits | 5,095,777 (58.6) | 160,035 (3.1) | |
4 to 6 visits | 2,834,653 (32.6) | 115,592 (4.1) | |
1 to 3 visits | 627,904 (7.2) | 33,697 (5.4) | |
None | 143,871 (1.7) | 10,011 (7.0) | |
Maternal age at birth (years) | 11,774 (0.1) | ||
20 to 35 | 6,072,560 (69.3) | 201,913 (3.3) | |
14 to 20 | 1,755,503 (20.0) | 76,544 (4.4) | |
35 to 49 | 940,218 (10.7) | 44,426 (4.7) | |
Newborn sex | 1363 (0.0) | ||
Male | 4,475,726 (51.1) | 134,850 (3.0) | |
Female | 4,291,841 (49.0) | 187,995 (4.4) | |
Birth order | 531,511 (6.1) | ||
2nd to 4th child | 4,847,199 (58.8) | 151,366 (3.1) | |
5th or later | 753,007 (9.1) | 32,189 (4.3) | |
1st child | 2,637,213 (32.0) | 115,774 (4.4) |