Table 4

Polyserial correlation between study variables, pooled analysis.

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


Boys below the diagonal, girls above the diagonal.

Torsheim et al. BMC Public Health 2010 10:324   doi:10.1186/1471-2458-10-324

Open Data