Table 2 Point and interval estimates for the parameters of the weight-for-age (WAZ) model. Brazil, 2008–2017

Intercept

−0.1588

0.0091

[−0.1767, − 0.1409]

Splines 1

− 0.3273

0.0161

[− 0.3590, − 0.2957]

Splines 2

− 0.2180

0.0086

[− 0.2348, − 0.2011]

Splines 3

0.0457

0.0097

[0.0267, 0.0647]

Splines 4

0.4605

0.0089

[0.4431, 0.4778]

Splines 5

0.4989

0.0090

[0.4813, 0.5165]

Splines 6

0.4744

0.0088

[0.4572, 0.4917]

Splines 7

0.3676

0.0088

[0.3503, 0.3848]

Splines 8

0.3038

0.0088

[0.2865, 0.3211]

Splines 9

0.2696

0.0089

[0.2522, 0.2869]

Splines 10

0.2464

0.0088

[0.2291, 0.2637]

Splines 11

0.2939

0.0121

[0.2701, 0.3177]

Sex (girls)

− 0.0329

0.0010

[−0.0349, − 0.0308]

Race / skin color (Asian descent)

−0.1474

0.0084

[− 0.1638, − 0.1309]

Race / skin color (Black)

− 0.1085

0.0029

[− 0.1142, − 0.1028]

Race / skin color (Pardo)

− 0.1727

0.0011

[− 0.1749, − 0.1705]

Race / skin color (Indigenous)

− 0.4986

0.0056

[− 0.5096, − 0.4876]

Educational level (3 years or less)

− 0.3217

0.0017

[− 0.3250, − 0.3184]

Educational level (4 to 7 years)

− 0.1603

0.0011

[− 0.1625, − 0.1581]

Civil status (single)

− 0.0253

0.0011

[− 0.0274, − 0.0233]

Civil status (divorced / widow)

0.0838

0.0054

[0.0732, 0.0945]

Mother’s age at birth

0.0060

0.0001

[0.0058, 0.0062]

σ_Intercept

0.9576

σ_ε

0.6675