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Table 1 - Descriptive values of lifestyle factors and mental health at baseline for the German and Chinese samples

From: Lifestyle choices and mental health: a longitudinal survey with German and Chinese students

  German students Chinese students  
  n M SD n M SD t (df) p d
Lifestyle factors
 Body mass index 2981 22.88 3.87 11350 20.49 2.66 39.29 (14461) < .001 0.65
 Physical activity (range: 0 to 4) 2991 2.24 1.19 12405 2.38 1.05 −6.36 (15394) < .001 0.10
 Mental activity (range: 0 to 4) 2991 2.72 1.10 12402 3.05 1.09 −14.62 (15391) < .001 0.24
 Alcohol frequency (range: 0 to 4) 2991 1.43 1.00 12371 0.65 .89 42.12 (15360) < .001 0.68
 Social rhythm irregularity (range: 10 to 60) 2991 29.58 9.01 12338 26.81 9.33 14.71 (15327) < .001 0.24
  n %   n %   χ2 p d
 Smoking (% yes) 608 20.3   1355 10.9   191.13 (1) < .001 0.22
 Vegetarian diet (% yes) 482 16.1   2734 22.2   55.45 (1) < .001 0.12
  n M SD n M SD t (df) p d
Mental health at baseline          
 Positive mental health (range: 0 to 27) 2979 18.13 5.46 12375 19.90 5.21 −16.52 (15352) < .001 0.27
 Mental health problems (range: 0 to 63) 2624 15.17 10.98 12306 9.50 10.14 25.65 (14928) < .001 0.42
  n M SD n M SD t (df) p d
Mental health at follow-up
 Positive mental health (range: 0 to 27) 632 18.23 5.58 8920 20.15 5.30 −8.79 (9550) < .001 0.18
 Mental health problems (range: 0 to 63) 600 14.16 10.53 8834 9.39 10.96 10.32 (9432) < .001 0.21