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. 2015 Dec 24;17(12):e285. doi: 10.2196/jmir.4762

Table 3.

Demographic characteristics and alcohol prevalence rates for RDS and WebRDS samples.

Demographic variables Sample population (unweighted), n (%)
N=1012a
P

RDS sample
n=232b
WebRDS sample
n=780b

Sex

.82

Male 136 (58.6) 465 (59.6)

Female 96 (41.4) 315 (40.4)
Age (years)

.10

14 49 (21.1) 133 (17.1)

15 71 (30.6) 207 (26.5)

16 58 (25.0) 256 (32.8)

17 54 (23.3) 184 (23.6)
Indigenous status

<.001

Aboriginal or Torres Strait Islander 13 (5.7) 6 (0.8)

Not Aboriginal or Torres Strait Islander 215 (94.3) 770 (99.2)
Main language spoken at home

.03

Australian 218 (94.4) 694 (89.4)

Other 13 (5.6) 82 (10.6)
Socioeconomic level (SEIFA deciles)

<.001

1-3 19 (8.4) 5 (0.7)

4-7 59 (26.2) 131 (17.1)

8-10 147 (65.3) 630 (82.2)
Drinking behavior



Never used alcohol 51 (22.2) 210 (26.9) .17

Past month drinkingb 75 (64.1) 156 (54.4) .08

Past 7-day drinking 50 (21.6) 90 (11.6) <.001

Past 7-day risky drinkingc 30 (13.0) 52 (6.7) .004

a Numbers may not add up to total (N=1012; RDS: n=232; WebRDS: n=780) due to missing data.

b “Past month drinking” only completed by participants who reported having ever drunk before.

c Risky drinking derived from “past 7-day drinking” variable using National Health and Medical Research Council guidelines of >4 drinks per day [30].