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Table 3 Association between physical exercise and non-suicidal self-harm (NSSH) and suicide attempt in male and female university and college students in the SHoT study, Norway, 2018

From: Physical exercise, mental health problems, and suicide attempts in university students

  Non-suicidal self-harm (NSSH) Suicide attempt
  Unadjusted model Adjusted modela   Unadjusted model Adjusted modela
n % OR 95% CI- 95%CI+ OR 95%CI- 95%CI+ n % OR 95%CI- 95%CI+ OR 95%CI- 95%CI+
Women
Physical exercise frequency
Never 447 34.5% 1.91 1.68 2.17 1.78 1.54 2.05 30 2.3% 2.53 2.05 3.13 1.99 1.57 2.51
Less than once a week 1200 29.6% 1.53 1.40 1.66 1.39 1.27 1.53 65 1.6% 1.58 1.33 1.86 1.24 1.03 1.49
Once a week 1417 25.0% 1.21 1.11 1.31 1.17 1.07 1.27 51 0.9% 1.08 0.91 1.27 0.96 0.81 1.15
2–3 times per week 3396 21.7% 1.01 0.94 1.08 0.95 0.89 1.02 142 0.9% 0.97 0.85 1.11 0.89 0.77 1.03
Almost every day 1651 21.6% 1.00 1.00 67 0.9% 1.00 1.00
Physical exercise intensity
I take it easy without breaking into a sweat or losing my breath 1757 28.2% 1.21 1.09 1.34 1.27 1.13 1.41 83 1.3% 1.13 0.94 1.37 1.06 0.86 1.30
I push myself so hard that I lose my breath and break into a sweat 5193 21.8% 0.86 0.78 0.94 0.87 0.79 0.96 201 0.8% 0.67 0.57 0.80 0.69 0.58 0.83
I push myself to near-exhaustion 688 24.5% 1.00 1.00 41 1.5% 1.00 1.00
Physical exercise duration
Less than 15 min 150 28.8% 1.38 1.13 1.68 1.35 1.08 1.68 10 1.9% 1.49 1.05 2.11 1.20 0.80 1.81
15–29 min 972 29.5% 1.43 1.31 1.56 1.48 1.34 1.63 41 1.2% 1.34 1.13 1.58 1.28 1.07 1.54
30 min to 1 h 4181 22.3% 0.98 0.92 1.04 1.00 0.94 1.06 167 0.9% 0.85 0.75 0.95 0.85 0.75 0.97
More than 1 h 2338 22.7% 1.00 1.00 107 1.0% 1.00 1.00
Men
Physical exercise frequency
Never 134 15.2% 1.92 1.55 2.38 1.66 1.31 2.09 18 2.0% 2.01 1.36 2.95 1.85 1.23 2.80
Less than once a week 306 14.5% 1.82 1.54 2.14 1.66 1.39 1.97 30 1.4% 2.13 1.59 2.86 2.05 1.50 2.81
Once a week 234 10.8% 1.29 1.09 1.54 1.22 1.01 1.47 21 1.0% 1.49 1.09 2.05 1.36 0.96 1.92
2–3 times per week 584 9.6% 1.14 0.99 1.31 1.10 0.95 1.28 56 0.9% 1.24 0.96 1.61 1.20 0.90 1.59
Almost every day 347 8.5% 1.00 1.00 20 0.5% 1.00 1.00
Physical exercise intensity
I take it easy without breaking into a sweat or losing my breath 313 15.0% 1.67 1.40 2.01 1.62 1.33 1.96 30 1.4% 1.66 1.23 2.25 1.63 1.17 2.26
I push myself so hard that I lose my breath and break into a sweat 920 9.3% 0.98 0.84 1.14 1.00 0.85 1.17 72 0.7% 0.78 0.60 1.01 0.80 0.60 1.07
I push myself to near-exhaustion 232 9.6% 1.00 1.00 25 1.0% 1.00 1.00
Physical exercise duration
Less than 15 min 52 18.2% 2.28 1.67 3.12 2.11 1.50 2.97 9 3.1% 2.33 1.37 3.94 1.61 0.86 3.03
15–29 min 177 14.1% 1.68 1.41 2.01 1.80 1.49 2.18 11 0.9% 1.72 1.26 2.36 2.03 1.46 2.83
30 min to 1 h 619 10.5% 1.21 1.07 1.36 1.19 1.05 1.35 54 0.9% 1.23 0.99 1.52 1.32 1.05 1.66
More than 1 h 615 8.9% 1.00 1.00 53 0.8% 1.00 1.00
  1. a Adjusted for sociodemographics, body-mass index, alcohol use and problems and sleep duration