Skip to main content

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