Head injuries

n

% Head injuries

(p-value)

OR_c (CI95%)

OR_a (CI95%)

(n = 884 with 341 HI)

(p_H&L = 0.983)

Gender

p < 0.001

Boys

786

45.7%

1.67 (1.33 - 2.11)

1.90 (1.35 - 2.69)

Girls

505

33.5%

1

1

Age groups

p_t < 0.001

Under 6 years

341

70.4%

14.93 (9.62 - 23.16)

17.78 (9.52 - 33.18)

6 - 9 years

385

48.6%

5.93 (3.88 - 9.06)

6.07 (3.28 - 11.22)

10 - 12 years

351

20.8%

1.65 (1.05 - 2.60)

1.54 (0.82 - 2.91)

13 years and more

233

13.7%

1

1

Place of injuries

p < 0.001

In the playground

750

46.0%

3.49 (2.49 - 4.89)

1.98 (1.17 - 3.34)

During physical education

260

19.6%

1

1

In classes

106

59.4%

6.00 (3.66 - 9.84)

5.47 (2.48 - 12.05)

Other places

194

37.6%

2.47 (1.62 - 3.77)

2.47 (1.30 - 4.70)

Mechanisms of injuries

p < 0.001

Fall

462

40.5%

4.1 (2.42 - 7.01)

2.28 (1.25 - 4.18)

Contact

219

58.0%

8.36 (4.74 - 14.73)

7.46 (3.92 - 14.20)

Movement

128

14.2%

1

1

Other mechanism

85

12.8%

0.89 (0.40 - 1.99)

0.54 (0.22 - 1.31)