Table 5

Univariate associations between injury riska and questionnaire variables

Variable Category

Variable

Strata

Men

Women


N

Injured(%)

Hazard Ratios(95%CI)from CoxRegressions

p-value(from WaldStatistic)

N

Injured(%)

Hazard Ratios(95%CI) fromCox Regressions

p-value(from WaldStatistic)


Tobacco Use

Smoked 100 Cigarettes in Lifetime

No

352

36.9

1.00

Referent

90

41.1

1.00

Referent


Yes

74

25.7

0.63 (0.40-1.03)

0.07

15

46.7

1.17 (0.52-2.61)

0.71


Age Smoked First Cigarette

NeverSmoked

244

41.4

1.00

Referent

64

35.9

1.00

Referent


6-17 years

116

26.7

0.56 (0.37-0.84)

<0.01

23

52.2

1.65 (0.82-3.32)

0.16


≥18 years

66

25.8

0.56 (0.34-0.94)

0.03

18

50.0

1.39 (0.65-3.01)

0.40


Smoked in Last 30 Days

No

413

34.9

1.00

Referent

102

42.2

1.00

Referent


Yes

13

38.5

1.04 (0.42-2.56)

0.92

3

33.3

0.69 (0.09-4.97)

0.71


Smokeless Tobacco Use Last 30 Days

No

402

35.1

1.00

Referent

104

42.3

1.00

Referent


Yes

24

33.3

0.92 (0.45-1.88)

0.82

1

0.0

-----

-----


Physical Activity

Self Rating of Physical Activity

Less Active

6

83.3

4.60 (1.88-11.26)

<0.01

3

66.7

2.18 (0.53-9.06)

0.28


About the same

30

26.7

0.75 (0.37-1.52)

0.42

12

33.3

0.69 (0.25-1.94)

0.48


More Active

390

34.9

1.00

Referent

90

42.2

1.00

Referent


Frequency of Aerobic Exercise in Last 2 Months

≤ 1 time/week

2

100.0

5.96 (1.44-24.69)

0.01

0

---

-----

-----


2-4 times/week

264

31.4

0.75 (0.54-1.03)

0.08

56

44.6

1.14 (0.63-2.07)

0.67


≥5 times/week

160

40.0

1.00

Referent

49

38.8

1.00

Referent


Duration of Aerobic Exercise Last 2 Months

0-30 minutes

84

34.5

0.73 (0.45-1.19)

0.02

9

44.4

0.89 (0.29-2.70)

0.83


31-60 minutes

257

32.3

0.70 (0.48-1.03)

0.07

68

38.2

0.77 (0.40-1.45)

0.40


≥61 minutes

85

43.5

1.00

Referent

28

50.0

1.00

Referent


Frequency of Weight Training in Last 2 Months

≤ 1 time/week

104

40.4

1.40 (0.78-2.52)

0.26

24

41.7

0.90 (0.25-3.28)

0.88


2-4 times/week

275

33.5

1.06 (0.61-1.83)

0.84

74

41.9

0.88 (0.27-2.89)

0.84


≥5 times/week

47

31.9

1.00

Referent

7

42.9

1.00

Referent


Duration of Weight Training in Last 2 Months

0-30 minutes

123

33.3

0.80 (0.49-1.31)

0.38

42

40.5

0.46 (0.19-1.10)

0.08


31-60 minutes

241

34.0

0.78 (0.50-1.22)

0.28

53

37.7

0.38 (0.16-0.90)

0.03


≥61 minutes

62

41.9

1.00

Referent

10

70.0

1.00

Referent


Frequency of Playing Sports Last 2 Months

≤ 1 time/week

376

35.4

0.61 (0.09-4.36)

0.62

91

40.7

0.76 (0.34-1.71)

0.51


2-4 times/week

48

31.3

0.50 (0.07-3.82)

0.51

14

50.0

1.00

Referent


≥5 times/week

2

50.0

1.00

Referent

0

---

-----

-----


Duration of Sports in Last 30 Days

0-30 minutes

253

36.8

1.01 (0.64-1.59)

0.97

59

42.4

0.85 (0.37-1.97)

0.71


31-60 minutes

110

30.0

0.79 (0.46-1.35)

0.39

32

37.5

0.71 (0.28-1.80)

0.48


≥61 minutes

63

36.5

1.00

Referent

14

50.0

1.00

Referent


Prior Injury

Prior Lower Limb Injury

No

167

29.3

1.00

Referent

40

42.5

1.00

Referent


Yes

259

38.6

1.45 (1.03-2.04)

0.03

65

41.5

1.07 (0.59-1.97)

0.82


Lower Limb Injury Prevented Normal Physical Activity for ≥1 week

No Injury

167

29.3

1.00

Referent

40

42.5

1.00

Referent


No

41

34.1

1.17 (0.65-2.12)

0.62

10

30.0

0.73 (0.22-2.50)

0.62


Yes

218

39.4

1.51 (1.06-2.14)

0.02

55

43.6

1.14 (0.61-2.12)

0.68



Returned to Normal Physical Activity Since Lower Limb Injury

No Injury

168

29.8

1.00

Referent

40

42.5

1.00

Referent


No

14

64.3

2.97 (1.46-6.05)

<0.01

4

50.0

1.29 (0.30-5.61)

0.73


Yes

244

36.9

1.35 (0.95-1.91)

0.09

61

41.0

1.06 (0.57-1.96)

0.86


Injured Upper Limb

No

248

31.0

1.00

Referent

73

41.1

1.00

Referent


Yes

178

40.4

1.38 (1.00-1.88)

0.05

32

43.8

1.04 (0.55-1.97)

0.90


Upper Limb Injury Prevented Normal Physical Activity for ≥1 Week

No Injury

248

31.0

1.00

Referent

73

41.1

1.00

Referent


No

34

35.3

1.13 (0.62-2.08)

0.70

9

33.3

0.88 (0.27-2.88)

0.83


Yes

144

41.7

1.43 (1.02-2.00)

0.04

23

47.8

1.10 (0.55-2.20)

0.79


Returned to Normal Physical Activity Since Upper Limb Injury

No Injury

247

30.8

1.00

Referent

73

41.1

1.09 (0.58-2.05)

0.97


No

11

72.7

2.93 (1.41-6.08)

<0.01

1

0.0

-----

-----


Yes

168

38.7

1.31 (0.94-1.83)

0.11

31

45.2

1.00

Referent


Pain Limiting Activity

Have Foot Pain Limiting Activity at Times

No

363

32.5

1.00

Referent

81

39.5

1.00

Referent


Yes

63

49.2

1.64 (1.10-2.44)

0.01

24

50.0

1.46 (0.75-2.84)

0.27


Have Knee Pain Limiting Activity at Times

No

313

31.3

1.00

Referent

82

41.5

1.00

Referent


Yes

113

45.1

1.67 (1.19-2.34)

<0.01

23

43.5

1.24 (0.61-2.51)

0.55


Have Back Pain Limiting Activity at Times

No

341

32.8

1.00

Referent

84

35.7

1.00

Referent


Yes

85

43.5

1.33 (0.92-1.93)

0.13

21

66.7

2.33 (1.23-4.40)

<0.01


Menstrual History

Age of Menarche

8-11 Years

9

22.2

0.43 (0.10-1.77)

0.24


12-14 Years

76

46.1

1.00

Referent


≥15 Years

19

31.6

0.61 (0.26-1.45)

0.26


Menstrual Periods Last Year

1-10

20

40.0

0.85 (0.40-1.84)

0.69


11-13

84

41.7

1.00

Referent


Gone ≥6 Months without Menstrual Cycle

No

102

40.2

1.00

Referent


Yes

2

100.0

2.84(0.69-11.77)

0.15


Used Birth Control in Past 12 Months

No

47

48.9

1.52 (0.84-2.77)

0.17


Yes

57

35.1

1.00

Referent


Used Hormonal Therapy in Past 12 Months

No

97

41.2

0.88 (0.27-2.85)

0.83


Yes

7

42.9

1.00

Referent


Ever Pregnancy

No

90

40.0

1.00

Referent


Yes

12

41.7

1.02 (0.40-2.61)

0.96


aAny injury (overuse and traumatic)

Knapik et al. BMC Public Health 2011 11:920   doi:10.1186/1471-2458-11-920

Open Data