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Table 3 Linear mixed-effects growth-curve models for women

From: Birth cohort, sex and educational disparities in the trajectories of body mass index in Taiwan: a longitudinal study

 

Height

 

Weight

 

BMI

 
 

Coefficient

P-value

Coefficient

P-value

Coefficient

P-value

Fixed effect parameters

For intercept (β0i)

 Intercept

158.875

< 0.001

55.764

< 0.001

22.092

< 0.001

 Education = JHS or lower

−2.368

< 0.001

2.417

< 0.001

1.691

< 0.001

 Education = HS/college

−0.664

< 0.001

0.672

< 0.001

0.471

< 0.001

 Education = U or higher

Reference

     

 Cohort = before 1920

−1.182

< 0.001

−1.061

0.414

−0.251

0.628

 Cohort = 1920–1929

−4.743

< 0.001

2.234

0.222

2.201

0.003

 Cohort = 1930–1939

−3.947

< 0.001

0.158

0.631

1.195

< 0.001

 Cohort = 1940–1949

−2.709

< 0.001

0.381

< 0.001

0.927

< 0.001

 Cohort = 1950–1959

−1.340

< 0.001

− 0.318

< 0.001

0.229

< 0.001

 Cohort = 1960–1969

Reference

     

 Cohort = 1970–1979

0.757

< 0.001

2.533

< 0.001

0.797

< 0.001

 Cohort = 1980–1989

1.100

< 0.001

7.791

< 0.001

2.734

< 0.001

 Cohort = After 1990

7.892

< 0.001

24.465

0.001

7.895

0.006

For linear slope (β1i)

 Intercept

−0.045

< 0.001

0.234

< 0.001

0.108

< 0.001

 Education = JHS or lower

0.002

0.203

0.003

0.472

0.008

< 0.001

 Education = HS/college

0.000

0.639

0.003

0.382

0.003

0.019

 Education = U or higher

Reference

     

 Cohort = before 1920

0.295

< 0.001

−0.086

0.307

−0.090

0.007

 Cohort = 1920–1929

0.165

< 0.001

−0.339

0.006

−0.187

< 0.001

 Cohort = 1930–1939

0.148

< 0.001

−0.217

< 0.001

− 0.135

< 0.001

 Cohort = 1940–1949

0.096

< 0.001

−0.238

< 0.001

− 0.131

< 0.001

 Cohort = 1950–1959

0.046

< 0.001

− 0.086

< 0.001

−0.048

< 0.001

 Cohort = 1960–1969

Reference

     

 Cohort = 1970–1979

−0.045

< 0.001

0.150

< 0.001

0.071

< 0.001

 Cohort = 1980–1989

−0.022

0.005

0.579

< 0.001

0.229

< 0.001

 Cohort = After 1990

0.557

0.001

1.835

0.006

0.611

0.020

For quadratic slope (β2i)

 Intercept

−0.004

< 0.001

− 0.002

< 0.001

0.000

< 0.001

 Education = JHS or lower

0.000

0.524

−0.002

< 0.001

−0.001

< 0.001

 Education = HS/college

0.000

< 0.001

0.000

0.138

0.000

0.260

 Education = U or higher

Reference

     

 Cohort = before 1920

−0.006

< 0.001

−0.004

0.032

0.000

0.728

 Cohort = 1920–1929

−0.002

0.002

0.002

0.471

0.001

0.192

 Cohort = 1930–1939

−0.002

< 0.001

0.001

0.241

0.001

0.003

 Cohort = 1940–1949

−0.001

< 0.001

0.002

< 0.001

0.001

< 0.001

 Cohort = 1950–1959

−0.001

< 0.001

−0.002

< 0.001

− 0.001

< 0.001

 Cohort = 1960–1969

Reference

     

 Cohort = 1970–1979

0.000

0.005

0.003

< 0.001

0.001

< 0.001

 Cohort = 1980–1989

0.002

< 0.001

0.015

< 0.001

0.005

< 0.001

 Cohort = After 1990

0.014

< 0.001

0.041

0.007

0.013

0.026

Random effects parameters

 Intercept (u0i)

27.765

 

82.198

 

11.549

 

 Linear slope (u1i)

0.002

 

0.083

 

0.013

 

 Quadratic slope (u2i)

0.000

 

0.000

 

0.000

 

 Residual (eti)

0.218

 

3.711

 

0.601

 
  1. JHS junior high school; HS high school; U University