Table 1.

Within-subject means and correlations comparing individual Timeline Followback (TLFB) to group TLFB

Variable	Individual TLFB Mean (SD)	Group TLFB Mean (SD)	Pearson’s r
Past 3 months
Drinking days	13.23 (10.14)	12.90 (10.24)	.938‡
Average drinks	4.72 (2.48)	4.68 (2.29)	.855‡
Total drinks per month	72.00 (72.37)	71.99 (78.22)	.950‡
Maximum drinks	8.55 (4.95)	8.69 (4.94)	.911‡
Past 1 month
Drinking days	4.90 (4.02)	5.00 (4.12)	.940‡
Average drinks	4.36 (2.73)	4.35 (2.48)	.905‡
Total drinks per month	26.15 (28.74)	26.18 (27.52)	.795‡
Maximum drinks	6.72 (4.70)	6.93 (4.82)	.902‡

Notes: There were no significant differences between individual and group TLFB administrations.

^‡Correlation significant at p < .001.