Variables
|
1996
|
2011
|
AAPC (95 % CI)
|
P
|
1996
|
2011
|
AAPC (95 % CI)
|
P
|
1996
|
2011
|
AAPC (95 % CI)
|
P
|
---|
|
North
|
Northeast
|
Southeast
|
Maternal age (years)
|
10–17 years
|
14.9
|
11.3
|
-
|
-
|
11.4
|
9.0
|
-
|
-
|
8.0
|
7.0
|
-
|
-
|
≥35 years
|
4.7
|
8.6
|
-
|
-
|
6.4
|
10.9
|
-
|
-
|
9.7
|
15.3
|
-
|
-
|
18-34
|
80.3
|
80.0
|
-
|
-
|
82.2
|
80.2
|
-
|
-
|
82.2
|
77.7
|
-
|
-
|
LBW 10–17 years
|
10.2
|
10.6
|
0.1 (−0.9;1.2)
|
<0.001
|
9.9
|
10.7
|
0.2 (−0.5;0.9)
|
0.037
|
11.9
|
10.9
|
−0.5 (−1.5;0.4)
|
0.227
|
LBW ≥35 years
|
6.6
|
8.6
|
1.8 (1.0;2.6)a
|
<0.001
|
7.7
|
9.0
|
0.6 (0.2;1.1)a
|
<0.001
|
11.0
|
9.3
|
−0.9 (−1.1;−0.6)a
|
<0.001
|
LBW 18–34
|
6.0
|
7.0
|
1.1 (0.5;1.8)a
|
<0.001
|
6.6
|
7.4
|
0.8 (0.5;1.1)a
|
<0.001
|
8.3
|
7.6
|
−0.4 (−1.2;0.4)
|
0.001
|
Educational level (years)
|
<8 years
|
64.2
|
28.3
|
-
|
-
|
62.3
|
26.2
|
-
|
-
|
48.9
|
19.5
|
-
|
-
|
≥12
|
3.0
|
16.4
|
-
|
-
|
5.5
|
19.5
|
-
|
-
|
10.4
|
24.5
|
-
|
-
|
8–11
|
32.7
|
55.3
|
-
|
-
|
32.2
|
54.3
|
-
|
-
|
40.7
|
56.0
|
-
|
-
|
LBW <8 years
|
7.1
|
8.3
|
1.2 (0.6;1.9)a
|
<0.001
|
7.7
|
9.0
|
1.1 (0.7;1.5)a
|
<0.001
|
10.0
|
9.7
|
−0.2 (−1.1;0.7)
|
<0.001
|
LBW ≥12
|
5.4
|
7.5
|
3.2 (1.3;5.0)a
|
<0.001
|
5.1
|
7.3
|
1.3 (0.6;2)a
|
<0.001
|
5.7
|
7.2
|
1.5 (1.0;2.1)a
|
<0.001
|
LBW 8-11
|
5.7
|
7.2
|
1.6 (1.3;2.0)a
|
<0.001
|
6.2
|
7.5
|
1.4 (0.7;2.2)a
|
<0.001
|
7.9
|
8.0
|
0.1 (−1.3;1.5)
|
<0.001
|
Prenatal care (no. of visits)
|
None
|
11.1
|
4.1
|
-
|
-
|
9.7
|
4.7
|
-
|
-
|
6.6
|
1.7
|
-
|
-
|
≤6 or
|
35.5
|
49.9
|
-
|
-
|
37.5
|
46.9
|
-
|
-
|
35.1
|
24.2
|
-
|
-
|
≥7
|
53.4
|
46.0
|
-
|
-
|
52.8
|
48.4
|
-
|
-
|
58.3
|
74.1
|
-
|
-
|
LBW None
|
10.1
|
13.9
|
2.7 (−0.2;5.6)
|
<0.001
|
11.3
|
13.2
|
1.5 (−0.5;3.6)
|
<0.001
|
16.9
|
24.2
|
3.7 (2.7;4.7)a
|
<0.001
|
LBW ≤6 or
|
7.5
|
9.3
|
1.3 (0.9;1.8)a
|
<0.001
|
8.4
|
9.8
|
1 (0.1;1.8)a
|
<0.001
|
11.7
|
14.0
|
1.4 (0.4;2.3)a
|
<0.001
|
LBW ≥7
|
5.4
|
5.0
|
−0.4 (−0.8;0.1)
|
0.002
|
5.1
|
5.2
|
0.4 (−0.2;0.9)
|
<0.001
|
6.1
|
5.8
|
−0.3 (−0.5;0.0)a
|
<0.001
|
Gestational age (weeks)
|
<37
|
4.9
|
10.8
|
-
|
-
|
4.9
|
11.0
|
-
|
-
|
6.5
|
8.7
|
-
|
-
|
≥37
|
95.1
|
89.2
|
-
|
-
|
95.1
|
89.0
|
-
|
-
|
93.5
|
91.3
|
-
|
-
|
LBW <37
|
45.1
|
34.9
|
1.2 (−1.6;4)
|
<0.001
|
48.1
|
39.4
|
−1.2 (−3.7;1.3)
|
<0.001
|
59.3
|
52.5
|
−0.1 (−0.6;0.4)
|
<0.001
|
LBW ≥37
|
4.6
|
4.2
|
0.1 (−0.7;0.8)
|
0.937
|
4.8
|
3.7
|
−1.3 (−2.2;0.4)a
|
<0.001
|
5.2
|
3.9
|
−2 (−2.7;1.3)a
|
<0.001
|
Mode of delivery
|
Caesarean section
|
34.5
|
51.2
|
-
|
-
|
38.0
|
60.3
|
-
|
-
|
47.3
|
53.1
|
-
|
-
|
Vaginal delivery
|
65.5
|
48.8
|
-
|
-
|
62.0
|
39.7
|
-
|
-
|
52.7
|
46.9
|
-
|
-
|
Caesarean section LBW
|
5.3
|
7.4
|
2.1 (1.4;2.8)a
|
<0.001
|
5.8
|
7.1
|
1.2 (0.7;1.7)a
|
<0.001
|
8.0
|
8.4
|
0.5 (−0.1;1.1)
|
<0.001
|
Vaginal delivery LBW
|
7.3
|
7.7
|
0.4 (0.0;0.9)
|
<0.001
|
7.7
|
9.0
|
0.7 (0.4;1.1)a
|
<0.001
|
9.6
|
7.8
|
−1.2 (−1.5;−0.9)a
|
<0.001
|
|
South
|
Central West
|
Brazil
|
Maternal age (years)
|
10–17 years
|
9.4
|
6.7
|
-
|
-
|
10.6
|
7.0
|
-
|
-
|
10.1
|
8.1
|
-
|
-
|
≥35 years
|
10.5
|
15.4
|
-
|
-
|
5.9
|
12.3
|
-
|
-
|
8.0
|
13.1
|
-
|
-
|
18-34
|
80.1
|
77.9
|
-
|
-
|
83.5
|
80.6
|
-
|
-
|
81.9
|
78.9
|
-
|
-
|
LBW 10–17 years
|
10.6
|
10.0
|
−0.3 (−1.1;0.5)
|
0.246
|
10.2
|
10.3
|
0.6 (0.1;1.0)a
|
0.001
|
11.0
|
10.8
|
−0.1 (−0.8;0.5)a
|
0.008
|
LBW ≥35 years
|
9.2
|
8.8
|
−0.5 (−1;−0.1)a
|
0.010
|
8.9
|
8.6
|
0.3 (−0.3;0.8)
|
0.175
|
9.8
|
9.1
|
−0.4 (−0.6;−0.2)
|
<0.001
|
LBW 18–34
|
6.8
|
7.5
|
0.5 (0.0;1.1)
|
<0.001
|
6.7
|
7.7
|
0.9 (0.5;1.2)a
|
<0.001
|
7.4
|
7.5
|
0.1 (−0.4;0.6)
|
<0.001
|
Educational level (years)
|
<8 years
|
46.2
|
20.6
|
-
|
-
|
52.6
|
18.8
|
-
|
-
|
55.4
|
22.3
|
-
|
-
|
≥12
|
10.8
|
33
|
-
|
-
|
7.4
|
27.0
|
-
|
-
|
7.2
|
22.9
|
-
|
-
|
8–11
|
42.9
|
46.4
|
-
|
-
|
40.1
|
54.2
|
-
|
-
|
37.4
|
54.8
|
-
|
-
|
LBW <8 years
|
8.6
|
9.5
|
1 (0.4;1.6)
|
<0.001
|
7.9
|
9.2
|
0.7 (0.2;1.2)a
|
<0.001
|
8.4
|
9.3
|
0.6 (−1;2.2)
|
,0.001
|
LBW ≥
|
5.2
|
6.8
|
1.8 (0.7;2.9)a
|
<0.001
|
5.7
|
7.8
|
1.8 (1.2;2.3)a
|
<0.001
|
5.6
|
7.3
|
1.5 (1.1;1.9)a
|
,0.001
|
LBW 8-11
|
6.6
|
7.8
|
1.1 (0.1;2.2)a
|
<0.001
|
6.5
|
7.6
|
1.2 (0.7;1.6)a
|
<0.001
|
6.9
|
7.8
|
0.9 (0.6;1.1)a
|
<0.001
|
Prenatal care (no. of visits)
|
None
|
4.4
|
1.4
|
-
|
-
|
5.5
|
3.3
|
-
|
-
|
8.3
|
3.0
|
-
|
-
|
≤6 or UD
|
32.5
|
17.7
|
-
|
-
|
40.1
|
27.6
|
-
|
-
|
35.8
|
33.5
|
-
|
-
|
≥7
|
63.2
|
80.9
|
-
|
-
|
54.5
|
69.2
|
-
|
-
|
55.9
|
63.5
|
-
|
-
|
LBW None
|
16.5
|
24.6
|
3.1 (1.4;4.8)a
|
<0.001
|
13.5
|
16.9
|
1.3 (−1.4;4.1)
|
<0.001
|
12.9
|
17.4
|
2.4 (0.6;4.1)a
|
<0.001
|
LBW ≤6 or UD
|
9.7
|
15.3
|
3.2 (2.4;4.0)a
|
<0.001
|
8.2
|
12.3
|
2.6 (2.1;3.1)a
|
<0.001
|
9.3
|
11.5
|
1.3 (0.2;2.4)a
|
<0.001
|
LBW ≥7
|
5.5
|
5.9
|
0.4 (−0.1;0.8)
|
0.011
|
5.9
|
5.7
|
0.3 (−0.2;0.8)
|
0.004
|
5.8
|
5.6
|
−0.1 (−0.3;0.0)
|
0.002
|
Gestational age (weeks)
|
<37
|
5.5
|
8.2
|
-
|
-
|
3.9
|
9.7
|
-
|
-
|
5.2
|
9.6
|
-
|
-
|
≥37
|
94.5
|
91.8
|
-
|
-
|
96.1
|
90.3
|
-
|
-
|
94.8
|
90.4
|
-
|
-
|
LBW <37
|
63.1
|
57.4
|
−0.5 (−0.8;−0.2)
|
<0.001
|
62.1
|
44.9
|
0 (−1.7;1.8)
|
0.019
|
56.1
|
46.1
|
−1 (−2.3;0.3)
|
<0.001
|
LBW ≥37
|
4.1
|
3.4
|
−1.4 (−1.8;−0.9)a
|
<0.001
|
4.9
|
4.0
|
−0.7 (−2.7;1.3)
|
<0.001
|
4.9
|
3.9
|
−1.6 (−2.1;−1.1)a
|
<0.001
|
Mode of delivery
|
Caesarean section
|
44.2
|
56.6
|
-
|
-
|
49.2
|
59.5
|
-
|
-
|
42.9
|
55.2
|
-
|
-
|
Vaginal delivery
|
55.8
|
43.4
|
-
|
-
|
50.8
|
40.5
|
-
|
-
|
57.1
|
44.8
|
-
|
-
|
Caesarean section LBW
|
7.3
|
8.4
|
0.5 (0.0;1.1)a
|
<0.001
|
6.3
|
8.0
|
1.6 (1.2;2.0)a
|
<0.001
|
7.1
|
8.0
|
1 (0.6;1.4)a
|
<0.001
|
Vaginal delivery LBW
|
7.5
|
7.1
|
−0.2 (−0.6;0.2)
|
0.078
|
8.1
|
8.0
|
0 (−0.4;0.5)
|
0.929
|
8.6
|
8.0
|
−0.5 (−1.1;0.2)
|
<0.001
|
- aAAPC average annual percentage of change