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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