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Table 2 Linear mixed-effects growth-curve models for men

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

171.173

< 0.001

72.623

< 0.001

24.767

< 0.001

 Education = JHS or lower

−3.138

< 0.001

−2.277

< 0.001

0.121

< 0.001

 Education = HS/college

−0.963

< 0.001

− 0.489

< 0.001

0.117

< 0.001

 Education = U or higher

Reference

     

 Cohort = before 1920

−8.143

0.009

−10.806

0.427

−2.448

0.591

 Cohort = 1920–1929

−6.275

< 0.001

−7.970

< 0.001

− 1.051

0.047

 Cohort = 1930–1939

−4.271

< 0.001

−6.264

< 0.001

−0.966

< 0.001

 Cohort = 1940–1949

−3.302

< 0.001

− 4.730

< 0.001

− 0.724

< 0.001

 Cohort = 1950–1959

− 1.593

< 0.001

−2.347

< 0.001

− 0.371

< 0.001

 Cohort = 1960–1969

Reference

     

 Cohort = 1970–1979

1.153

< 0.001

2.844

< 0.001

0.646

< 0.001

 Cohort = 1980–1989

2.390

< 0.001

5.857

< 0.001

1.219

< 0.001

 Cohort = After 1990

6.254

< 0.001

16.950

0.042

4.758

0.088

For linear slope (β1i)

 Intercept

−0.043

< 0.001

0.134

< 0.001

0.060

< 0.001

 Education = JHS or lower

− 0.009

< 0.001

−0.007

0.237

0.005

0.009

 Education = HS/college

−0.004

< 0.001

0.010

0.001

0.006

< 0.001

 Education = U or higher

Reference

     

 Cohort = before 1920

0.375

0.019

0.164

0.816

0.003

0.989

 Cohort = 1920–1929

0.271

< 0.001

0.056

0.595

−0.056

0.112

 Cohort = 1930–1939

0.141

< 0.001

− 0.038

0.274

− 0.060

< 0.001

 Cohort = 1940–1949

0.074

< 0.001

−0.024

0.124

−0.033

< 0.001

 Cohort = 1950–1959

0.038

< 0.001

0.019

0.002

−0.005

0.017

 Cohort = 1960–1969

Reference

     

 Cohort = 1970–1979

−0.053

< 0.001

−0.194

< 0.001

− 0.047

< 0.001

 Cohort = 1980–1989

0.009

0.241

− 0.060

0.147

− 0.027

0.048

 Cohort = After 1990

0.322

0.048

0.748

0.326

0.235

0.357

For quadratic slope (β2i)

 Intercept

−0.004

< 0.001

− 0.012

< 0.001

− 0.003

< 0.001

Education = JHS or lower

0.000

< 0.001

0.001

< 0.001

0.000

0.517

 Education = HS/college

0.000

0.273

0.000

0.613

0.000

0.573

 Education = U or higher

Reference

     

 Cohort = before 1920

−0.004

0.082

0.004

0.690

0.001

0.661

 Cohort = 1920–1929

−0.002

< 0.001

0.005

0.004

0.002

< 0.001

 Cohort = 1930–1939

−0.001

< 0.001

0.008

< 0.001

0.003

< 0.001

 Cohort = 1940–1949

0.000

0.970

0.007

< 0.001

0.002

< 0.001

 Cohort = 1950–1959

0.000

0.556

0.004

< 0.001

0.001

< 0.001

 Cohort = 1960–1969

Reference

     

 Cohort = 1970–1979

− 0.001

< 0.001

− 0.011

< 0.001

− 0.003

< 0.001

 Cohort = 1980–1989

0.002

< 0.001

−0.005

< 0.001

− 0.002

< 0.001

 Cohort = After 1990

0.008

0.024

0.012

0.478

0.004

0.544

Random effects parameters

 Intercept (u0i)

33.597

 

120.480

 

11.174

 

 Linear slope (u1i)

0.002

 

0.129

 

0.015

 

 Quadratic slope (u2i)

0.000

 

0.000

 

0.000

 

 Residual (eti)

0.213

 

4.312

 

0.504

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