Table 1

Characteristics of those not reporting a head injury at wave one

20-24 cohort N = 1916

40-44 cohort N = 2156

60-64 cohort N = 2021

p value


Age (years)

mean (SD)

22.6 (1.5)

42.6 (1.5)

62.5(1.5)

Not tested

Gender (female)

n (%)

1050 (54.8)

1186 (55.0)

1013 (50.1)

.002

Years of education

mean (SD)

14.3 (1.5)

14.5 (2.3)

13.9 (2.6)

<.001

Marital status

married/de facto n (%)

467 (24.5)

1714 (79.5)

1593 (78.9)

<.001

separated/divorced/widowed n (%)

23 (1.2)

272 (12.6)

376 (18.6)

never married n (%)

1413 (74.3)

169 (7.8)

50 (2.5)

Smoking status

never smoked n (%)

1124 (59.2)

1132 (52.5)

1100 (54.5)

<.001

past smoker n (%)

216 (11.4)

651 (30.2)

734 (36.4)

current smoker n (%)

560 (29.5)

372 (17.3)

185 (9.2)

Alcohol classification

light/niln (%)

1782 (93.9)

2014 (93.6)

1906 (94.5)

.786

hazardous n (%)

95 (5.0)

110 (5.1)

89 (4.4)

harmful n (%)

21 (1.1)

27 (1.3)

21 (1.0)

Problem marijuana usea

n (%)

229 (12.0)

56 (2.6)

2 (0.1)

<.001

Depression medication yes: no

n (%)

86 (4.5):

144 (6.7):

96 (4.8):

.003

n (%)

1815 (95.5)

2011 (93.3)

1923 (95.2)

Anxiety medication yes: no

n (%)

114 (6.0):

155 (7.2):

87 (4.3):

<.001

n (%)

1787 (94.0)

2000 (92.8)

1932 (95.7)

Pain medication yes: no

n (%)

1283 (67.5):

1473 (68.4):

1099 (54.4):

<.001

n (%)

618 (32.5)

682 (31.6)

920 (45.6)

Memory medication yes: no

n (%)

32 (1.7):

52 (2.4):

57 (2.8):

.057

n (%)

1869 (98.3)

2103 (97.6)

1962 (97.2)

Sleep medication yes: no

n (%)

183 (9.6):

284 (13.2):

249 (12.3):

.001

n (%)

1718 (90.4)

1871 (86.8)

1770 (87.7)


adefined via self-reported used more than planned or wanting to cut down use

Tait et al. BMC Public Health 2010 10:171   doi:10.1186/1471-2458-10-171

Open Data