Table 1

Confirmatory Analyses of Socio-demographic and Alcohol Grouping Measures and Substance use characteristics of the sample (n = 162)

Control Group

(n = 81)

AUDs Group

(n = 81)


M (SD) or %

M (SD) or %

U/χ2

p-value


Socio-demographics

Age

14.76 (0.78)

14.92 (0.74)

-1.19

0.235

Education level a

7.79 (0.85)

7.85 (0.74)

-0.43

0.666

%Male

42

42

0.00

1.000

%Female

58

58

% Afrikaans-speaking

69

69

0.00

1.000

%English-speaking

31

31

% Mixed Ancestry

97.6

97.6

0.497

% White

1.2

0

% Black

1.2

0

Total Socio-economic status score b

28.19 (5.80)

24.85 (5.93)

1.34

0.179


Alcohol Use

% Never consumed alcohol

41

0

% Never intoxicated

93

0

%Light drinker c

59

0

% Alcohol abuse d

2.5

% Alcohol dependence e

97.5

% Weekends-only drinking style

in most recent drinking phase f

95

Drinking onset age (years) in

participants that have drunk alcohol

12.25 (1.66)

12.04 (1.70)

0.57

0.567

Alcohol lifetime dose g

5.77 (12.46)

1493.69 (1511.53)

-11.04

< 0.001

Age of first intoxication

12.83 (1.15)

Age of onset of regular drinking

12.91 (1.11)

Regular drinking duration (months)

23.78 (15.91)

Regular drinking frequency (days/month)

in most recent drinking phase

5.01 (2.87)

Regular drinking quantity per month h

65.78 (57.96)


Tobacco Use

% Never smoked tobacco

59

17

< 0.001

% Light smokers (lifetime < 100 cigarettes)

35

31

% Regular smokers (lifetime > 100 cigarettes)

6

52

Smoking onset age (years) in light smokers

12.53 (1.62)

12.44 (1.96)

-0.19

0.846

Smoking onset age (years) in regular smokers

13 (0.71)

12.36 (1.46)

0.96

0.339

Lifetime tobacco dose of all smokers i

86.42 (442.80)

1417.59 (2762.60)

-7.02

< 0.001


Other Substance Use

% Never used cannabis

89

42

34.35

< 0.001

Lifetime cannabis dose j

0.12 (0.37)

4.08 (7.40)

-6.33

< 0.001

% Never used methamphetamine

100

96

0.245

Lifetime methamphetamine dose k

0

1.0 (0.56)

% Never used any other drugs

100

100


Notes: For all variables not presented as percentages, means are presented with standard deviations in parentheses. Continuous variables compared using the Mann Whitney U Test and categorical variables compared using the Chi-Square or Fisher's exact test.

a Years of successfully completed education

b Total Socio-economic status score: Sum of Family income (1-6), Reversed employment category of participant's parent with the highest employment rank (Hollingshead reversed) (1-9), Parent education (0-6), Total assets (0-7), Dwelling type (1-6) and Bedroom cohabitation (1-7) - Maximum = 41

c Less than 100 standard drinks of alcohol consumed in lifetime

d Greater than 100 standard drinks of alcohol consumed in lifetime with a DSM-IV diagnosis of alcohol abuse

e Greater than 100 standard drinks of alcohol consumed in lifetime with a DSM-IV diagnosis of alcohol dependence

f Style of drinking followed in the most recent phase of drinking

g Total number of standard drinks of alcohol consumed in lifetime

h Average standard drinks of alcohol consumed per month

i Total number of cigarettes smoked in lifetime

j Total number of 'joints' smoked in lifetime;

k Total number of 'straws' (hits) of methamphetamine in lifetime

Naude et al. Nutrition Journal 2011 10:87   doi:10.1186/1475-2891-10-87

Open Data