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Table 4 Polyserial correlation between study variables, pooled analysis.

From: Screen-based activities and physical complaints among adolescents from the Nordic countries

  1. 2. 3. 4. 5. 6. 7. 8.
1. Backache weekly   0.43 0.42 -0.10 0.28 0.04 0.18 0.13
2. Headache weekly 0.39   0.42 -0.08 0.28 0.03 0.19 0.10
3. Feeling low weekly 0.38 0.39   -0.14 0.37 0.06 0.23 0.11
4. Moderate physical activity -0.08 -0.07 -0.13   -0.12 -0.05 -0.13 -0.16
5. School-related stress 0.25 0.22 0.28 -0.09   -0.02 0.19 0.10
6. Computer games 0.09 0.07 0.05 -0.14 0.06   0.28 0.26
7. Computer use 0.15 0.10 0.10 -0.10 0.13 0.35   0.28
8. Television viewing 0.11 0.07 0.06 -0.10 0.08 0.35 0.27  
  1. Boys below the diagonal, girls above the diagonal.