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Table 1 Baseline characteristics and health status of participants in the study compared to non-participants at six, 12 and 24 month follow up

From: Predictors of return to work following motor vehicle related orthopaedic trauma

 

Participation at six months

Participation at 12 months

Participation at 24 months

Variable

No (n = 101)

Yesa (n = 233)

P

No (n = 124)

Yesa (n = 210)

P

No (n = 151)

Yesa (n = 182)

p

Age (years), Mean (SD)

31.9 (12.0)

38.2 (14.2)

**

31.7 (11.5)

39.0 (14.4)

**

31.5 (11.7)

40.3 (14.3)

**

New Injury Severity Score, No. (%)

  

NS

  

*

  

NS

 Minor - moderate 1-8

22 (21.8)

41 (17.6)

 

27 (21.8)

36 (17.1)

 

33 (21.9)

30 (16.5)

 

 Serious 9-15

50 (49.5)

94 (40.3)

 

61 (49.2)

83 (39.5)

 

71 (47.0)

73 (40.1)

 

 Severe - critical 16-75

29 (28.7)

98 (42.1)

 

36 (29.0)

91 (43.3)

 

47 (31.1)

79 (43.4)

 

Marital status, No. (%)

  

**

  

**

  

**

 Single

60 (60.0)

87 (37.5)

 

68 (54.8)

79 (38.0)

 

86 (57.0)

61 (33.9)

 

 Married/defacto

36 (36.0)

131 (56.5)

 

53 (42.7)

114 (54.8)

 

61 (40.4)

105 (58.3)

 

 Divorced/widowed

4 (4.0)

14 (6.0)

 

3 (2.4)

15 (7.2)

 

4 (2.6)

14 (7.8)

 

Occupation skill levelb, No. (%)

  

*

  

NS

  

*

 Managers/professionals

20 (19.8)

58 (25.0)

 

23 (18.5)

55 (26.3)

 

60 (26.1)

38 (17.1)

 

 Tradespersons

26 (25.7)

85 (36.6)

 

36 (29.0)

75 (35.9)

 

71 (30.9)

55 (24.8)

 

 Intermediate clerical

17 (16.8)

35 (15.1)

 

21 (16.9)

31 (14.8)

 

27 (11.7)

37 (16.7)

 

 Elementary related

38 (37.6)

54 (23.3)

 

44 (35.5)

48 (23.0)

 

53 (23.0)

72 (32.4)

 

Body Mass Index (BMI)c (kg/m2)

  

*

  

NS

  

NS

 <18.50 (underweight)

4 (4.0)

2 (0.9)

 

4 (3.2)

2 (1.0)

 

4 (2.6)

2 (1.1)

 

 18.50-24.99 (normal)

45 (44.6)

78 (33.8)

 

50 (40.3)

73 (35.1)

 

64 (42.4)

58 (32.2)

 

 ≥25.00 (overweight)

35 (34.7)

89 (38.5)

 

47 (37.9)

77 (37.0)

 

53 (35.1)

71 (39.4)

 

 ≥30.00 (obese)

17 (16.8)

62 (26.8)

 

23 (18.5)

56 (26.9)

 

30 (19.9)

49 (27.2)

 

Smoking history, No. (%)

  

*

  

NS

  

NS

 Current smoker

38 (38.0)

51 (22.0)

 

40 (32.5)

49 (23.4)

 

48 (32.0)

40 (22.1)

 

 Ex-smoker

23 (23.0)

67 (28.9)

 

32 (26.0)

58 (27.8)

 

36 (24.0)

54 (29.8)

 

 Never smoked

39 (39.0)

114 (49.1)

 

51 (41.5)

102 (48.8)

 

66 (44.0)

87 (48.1)

 

 Self-reported chronic illnesses (yes) No. (%)

17 (16.8)

76 (32.6)

**

26 (21.0)

67 (31.9)

*

35 (23.2)

58 (31.9)

NS

 Medication use (current), No. (%)

11 (10.9)

56 (24.1)

**

13 (10.5)

54 (25.8)

**

19 (12.6)

48 (26.5)

**

Vehicle type, No. (%)

  

*

  

*

  

*

 Motor vehicle

61 (60.4)

114 (48.9)

 

71 (57.3)

104 (49.5)

 

87 (57.6)

88 (48.4)

 

 Motorcycle

31 (30.7)

109 (46.8)

 

42 (33.9)

98 (46.7)

 

53 (35.1)

87 (47.8)

 

 Bicycle

9 (8.9)

10 (4.3)

 

11 (8.9)

8 (3.8)

 

11 (7.3)

7 (3.8)

 
  1. aParticipation status ‘yes’ was measured using the information recorded in variables - work status at six, 12 and 24 months, and the Short Form-36 Version 2.0 (SF36v2), Physical Component Score (PCS) at six, 12 and 24 months respectively
  2. ** P < 0.01, *P < 0.05, NS not significant
  3. bThe measure for occupation is from the Australian Standard Classification of Occupations (ASCO), Cat. No. 1220.0, Australian Bureau of Statistics 1997. See Table 2, Occupational skill level for all categories
  4. cBMI classification is from the Global Database on Body Mass Index, World Health Organisation
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