Table 1.
Descriptive statistics (N = 2495).
| Variables | Mean/Sample % | (SD) | Test Statistics a | p b |
|---|---|---|---|---|
| Psychological well-being | 14.38 | (4.02) | t = 1.22 | p = 0.004 |
| Normal sleep quality | 49 | (19.07) | t = 0.56 | p = 0.001 |
| Poor sleep quality | 78 | (32.13) | t = 0.41 | p = 0.002 |
| Gender | ||||
| Female | 47% | X2 = 4.313 | p = 0.036 | |
| Male | 53% | |||
| Education | ||||
| 985 project | 11% | X2 = 1.66 | p = 0.017 | |
| 211 project | 17% | |||
| Yi Ben | 19% | |||
| Er Ben | 28% | |||
| San Ben | 25% | |||
| Household conditions | ||||
| State & society administrator (cadre in governments), Manager (Manager or department leader in a state company, private company, foreign company and joint company) | 7% | X2 = 4.69 | p = 0.023 | |
| Private enterprise owner (having large scale company), Technological specialist (teacher, engineer, doctor, academic researcher, lawyer, culture worker) | 15% | |||
| Clerk & office worker (secretary, accountant, computer operator), Individual entrepreneur (one-person company with unlimited liability) | 29% | |||
| Commercial & service worker (tertiary industry workers), Industrial worker (worker in factory, mining and transport industry) | 35% | |||
| Farmer, Unemployed | 14% | |||
| Marital or relationship status | ||||
| Yes | 37% | X2 = 3.03 | p = 0.002 | |
| No | 63% | |||
| Physical activity | ||||
| Physically inactive | 37% | X2 = 5.31 | p = 0.000 | |
| Less active (1–4 occasions per month) | 49% | |||
| More active (5+ occasions per month) | 14% | |||
| Body mass index; mean (SD) | 26.51 | (4.7) | t = 3.08 | p = 0.016 |
| Place of birth | ||||
| Rural | 39% | X2 = 1.75 | p = 0.015 | |
| Urban | 61% | |||
| Subjects | ||||
| Humanities and Social Sciences | 23% | X2 = 1.75 | p = 0.046 | |
| Science | 35% | |||
| Engineering | 42% | |||
| Age | t = 4.43 | p = 0.033 | ||
| 18 | 2% | |||
| 19–20 | 3% | |||
| 21–24 | 85% | |||
| 25–30 | 10% |
a Test-statistics refers to t-test, assessing the two-sample mean differences of variables. Chi-tests is for assessing the categorical variables, including gender, education household conditions and household conditions. About undergraduate education, five tiers of universities were used, including 985 projects university, 211 project university, Yiben, Erben and Sanben. The tier is the basic university classification in China. b The p means the p-value, representing the significance in statistics.