Table 3 Association between femur shaft fractures and injury requiring hospital admission grouped according to follow-up time after injury among 1,404 children (exposed) who were one to three years of age when they suffered a femur shaft fracture with the risk among 13,814 (unexposed) randomly selected, gender- and age-matched femur fracture–free children

All injuries^c

97

885

1.08 (0.88–1.33)

23

241

0.94 (0.61–1.44)

74

644

1.13 (0.89–1.44)

0.45

Boys

83

717

1.14 (0.91–1.43)

22

199

1.09 (0.70–1.69)

61

518

1.16 (0.89–1.51)

0.80

Girls

14

168

0.91 (0.42–1.98)

1

42

0.23 (0.03-1.69)

13

126

1.02 (0.57–1.80)

0.16

All fractures

54

388

1.38 (1.04–1.84)

10

73

1.35 (0.70–2.62)

44

315

1.39 (1.01–1.90)

0.94

Boys

47

312

1.50 (1.10–2.03)

10

57

1.73 (0.88–3.38)

37

255

1.44 (1.02–2.04)

0.64

Girls

7

76

0.91 (0.42–1.98)

0

16

N.A.

7

60

1.15 (0.53–2.52)

0.98

Upper-limb fractures^d

33

297

1.09 (0.76–1.57)

5

53

0.93 (0.37–2.32)

28

244

1.13 (0.76–1.67)

0.70

Boys

29

239

1.19 (0.81–1.75)

5

42

1.17 (0.46–2.95)

24

197

1.20 (0.79–1.83)

0.96

Girls

4

58

0.68 (0.25–1.86)

0

11

N.A.

4

47

0.83 (0.30–2.31)

0.98

Lower-limb fractures^{d, e}

17

68

2.49 (1.46–4.23)

5

15

3.27 (1.19–9.00)

12

53

2.26 (1.21–4.23)

0.54

Boys

14

53

2.62 (1.45–4.71)

5

10

4.90 (1.67–14.33)

9

43

2.08 (1.01–4.26)

0.19

Girls

3

15

2.02 (0.58–6.97)

0

5

N.A.

3

10

3.05 (0.84–11.10)

0.99

Soft-tissue injury

46

562

0.80 (0.59–1.08)

13

171

0.74 (0.43–1.31)

33

391

0.83 (0.58–1.18)

0.77

Boys

38

457

0.81 (0.58–1.13)

12

145

0.81 (0.45–1.47)

26

312

0.81 (0.54–1.21)

0.99

Girls

8

105

0.76 (0.37–1.55)

1

26

0.38 (0.05–2.77)

7

79

0.89 (0.41–1.92)

0.43