Table 2.
Variable | Mean (SD) or percentage (%) | ||||
---|---|---|---|---|---|
All (n = 10,540) | High school (n = 2,855) | Undergraduate (n = 7,419) | Graduate (n = 266) | P-value | |
Age (year) | 19.9 (2.3) | 17.5 (1.2) | 20.6 (1.8) | 24.7 (3.4) | <0.001 |
Sex | <0.001 | ||||
Male | 28.7 | 24.2 | 30.4 | 27.8 | |
Female | 71.3 | 75.8 | 69.6 | 72.2 | |
Ethnicity | <0.001 | ||||
Han | 94.9 | 96.7 | 94.4 | 91.0 | |
Minority | 5.1 | 3.3 | 5.6 | 9.0 | |
Urbanicity | <0.001 | ||||
Urban | 38.2 | 24.3 | 42.6 | 62.8 | |
Non-urban | 61.8 | 75.7 | 57.4 | 37.2 | |
Region a | <0.001 | ||||
Northeast | 0.3 | 0.1 | 0.3 | 3.4 | |
East | 9.2 | 0.7 | 11.9 | 25.2 | |
West | 87.1 | 99.2 | 83.5 | 56.8 | |
Central | 3.4 | 0.0 | 4.3 | 14.6 | |
Household income ( yuan /year) | <0.001 | ||||
<12,000 | 20.0 | 24.5 | 18.7 | 6.8 | |
≥12,000–20,000 | 28.0 | 35.6 | 25.8 | 8.3 | |
>20,000–60,000 | 26.7 | 25.8 | 27.3 | 21.8 | |
>60,000–10,0000 | 13.1 | 9.5 | 14.1 | 23.3 | |
>100,000–200,000 | 8.6 | 3.3 | 10.0 | 25.9 | |
>200,000 | 3.6 | 1.3 | 4.1 | 13.9 | |
Major | <0.001 | ||||
Medical Science | 37.0 | 88.7 | 16.5 | 52.3 | |
Science/Engineering | 25.8 | 10.5 | 31.7 | 26.3 | |
Social Science | 37.2 | 0.8 | 51.8 | 21.4 |
Northeast (Liaoning, Jilin, Heilongjiang province), East (Beijing, Tianjin, Hebei, Shanghai, Jiangsu, Zhejiang, Fujian, Shandong, Guangdong, Hainan province), Central (Shanxi, Anhui, Jiangxi, Henan, Hubei, Hunan province), and West of China (Inner Mongolia, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Tibet, Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang). All significant p-values (p < 0.05) were bolded.