Table 4

Linear-by-linear association chi-square test
Category Value P
Class years of education 0.32 0.57
Monthly expenses 120.52 >0.01
Sleeping quality 93.34 >0.01
Learning process 152.84 >0.01

Sun et al.

Sun et al. BMC Public Health 2013 13:42   doi:10.1186/1471-2458-13-42

Open Data