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Table 1 Summary statistics

From: The relationship between exercise habits and mental health among university students in China: a cross-sectional study based on instrumental variable analysis

Variables

Nature of variables

Description

Independent Variable

ÌýÌý

 Exercise Habits

Numeric

12–84 points (mean 50.31, standard 20.08)

Dependent Variables

ÌýÌý

 Positive Affect

Numeric

10–50 points (mean 33.66, standard 6.93)

 Life Satisfaction

Numeric

5–35 points (mean 21.02, standard 6.43)

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Numeric

25–60 points (mean 39.90, standard 4.73)

Instrumental Variable

ÌýÌý

 Distance between Dormitory and Sport Field

Numeric

51.22–1500Ìým (mean 566.29, standard 372.73)

Covariates

ÌýÌý

 G±ð²Ô»å±ð°ù

Categorical

0 = male (41.52%), 1 = female (58.48%)

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Numeric

16–33 years old (mean 21.62, standard 2.95)

 M²¹Âá´Ç°ù

Categorical

0 = Arts and Humanities (35.62%), 1 = Science and Engineering (64.38%)

 E³Ù³ó²Ô¾±³¦¾±³Ù²â

Categorical

0 = Han ethnicity (93.04%), 1 = Ethnic minorities (6.96%)

 Father Education

Categorical

1 = Elementary school and below (6.07%), 2 = Junior high school (19.20%), 3 = High school (18.13%), 4 = Associate degree (18.30%), 5 = Bachelor’s degree (30.97%), 6 = Master’s degree (5.54%), 7 = Doctorate (1.79%)

 Mother Education

Categorical

1 = Elementary school and below (6.07%), 2 = Junior high school (19.20%), 3 = High school (18.13%), 4 = Associate degree (18.30%), 5 = Bachelor’s degree (30.97%), 6 = Master’s degree (5.54%), 7 = Doctorate (1.79%)

 Family Income

Categorical

1 = Below 2,857 dollars (6.70%), 2 = 2,857 to 7,143 dollars (13.39%), 3 = 7,143 to 14,286 dollars (25.45%), 4 = Above 14,286 dollars (54.46%)

 Household Registration

Categorical

0 = Rural household registration (30.71%), 1 = Urban household registration (69.29%)

 Chronic Disease

Categorical

0 = No(18.12%), 1 = Yes (81.88%)

 Mental Disorder

Categorical

0 = No(97.59%), 1 = Yes (2.41%)