marginally significantp -value = 0.035
For the binary data of “college or university degree” versus other six categories, the bivariate GREML indicated a marginally significant heterogeneity between POP1 and POP2 ( p -value = 0.035) and no significant signal between POP2 and POP3 ( p -value = 0.494), and POP1 and POP3 ( p -value = 0.94).