Table 7.

Amount of variance of drinking outcome explained by social network predictors and AA^a

Study month	Arm	Dep. var.	Pro-abstainers	Pro-drinkers	Pro-abstainers + Pro-drinkers	AA attendance
15	AC	PDA	3.3%	9.2%	10.9%	5.8%
15	AC	DDD	1.6%	4.4%	5.2%	6.0%
15	OP	PDA	3.6%	9.1%	11.8%	0.9%
15	OP	DDD	0.8%	6.9%	7.4%	1.8%
39	OP	PDA	2.5%	8.1%	10.0%	0.9%
39	OP	DDD	1.2%	5.8%	6.8%	0.7%

Notes: AA = Alcoholics Anonymous; dep. var. = dependent variable; AC = aftercare; OP = outpatient; PDA = percentage of days abstinent (arcsin transformed); DDD = drinks per drinking day (square root transformed).

^aPartial eta-squared values were estimated from Type III sums of squares, averaged over multiple imputation samples.