Table 2

Baseline and follow-up AUDIT scores for those attending the clinic, by traffic-light category

Variable	Green, n = 191	Amber/red, n = 202	Total n = 393	P-value
Response to 1-year AUDIT, n (%)	150 (79)	153 (76)	303 (77)

Baseline AUDIT
Mean (SD)	13.0 (5.7)	12.8 (5.1)	12.9 (5.4)	0.893^a
Median	11	11	11
Lower to upper quartile	9–15	9–15	9–15
Minimum–maximum	8–36	8–36	8–36

1-year follow-up AUDIT
Mean (SD)	10.6 (5.4)	9.5 (5.3)	10.0 (5.4)	0.070^a
Median	9	9	9
Lower to upper quartile	7–12.3	6–12	6–12
Minimum–maximum	3–29	0–36	0–36

Change in AUDIT at follow-up (negative value is a reduction)
Mean (SD)	−1.9 (3.6)	−3.0 (4.5)	−2.4 (4.1)	0.014^b
Minimum–maximum	−15 to 7	−17 to 9	−17 to 9

Completed cases only
P-value for change	<0.001^c	<0.001^c	<0.001^c

↵a Mann-Whitney test.
↵b Independent samples t-test.
↵c Paired-samples t-test. AUDIT = Alcohol Use Disorders Identification Test. SD = standard deviation.