Table 5.

Test of mediation for specific indirect (i.e., mediated) effects using the Product of Coefficients approach

Alcohol Outcome Mediator	Younger Adults (adj. n=246)				Adults aged 30+ (adj. n=1,298)
	EST	SE	95% CI	%†	EST	SE	95% CI	%†
Percent of Days Abstinent (PDA)
Self-Efficacy (NA)	0.000	0.001	[−0.0012, 0.0017]	1.3%	0.001	0.000	[0.0000, 0.0013]	3.3%
Self-Efficacy (Soc)	0.003	0.002	[0.0008, 0.0071] *	31.5%	0.004	0.001	[0.0025, 0.0067] *	28.0%
Religiousness	−0.001	0.001	[−0.0031, 0.0013]	6.6%	0.003	0.001	[0.0009, 0.0043] *	15.8%
Depression	0.000	0.001	[−0.0017, 0.0012]	1.4%	0.000	0.000	[−0.0001, 0.0012]	2.7%
SocNet: pro-abst.	0.001	0.001	[−0.0010, 0.0030]	6.8%	0.004	0.001	[0.0025, 0.0059] *	25.4%
SocNet: pro-drk.	0.006	0.002	[0.0020, 0.0104] *	52.4%	0.004	0.001	[0.0021, 0.0060] *	24.8%
Drinks per Drinking Day (DDD)
Self-Efficacy (NA)	0.000	0.001	[−0.0053, 0.0039]	1.1%	−0.003	0.002	[−0.0076, 0.0000]	8.0%
Self-Efficacy (Soc)	−0.012	0.006	[−0.0258, −0.0020] *	38.0%	−0.013	0.003	[−0.0193, −0.0068] *	29.1%
Religiousness	0.002	0.004	[−0.0063, 0.0110]	6.0%	−0.008	0.003	[−0.0149, −0.0022] *	19.0%
Depression	0.001	0.003	[−0.0061, 0.0087]	2.7%	−0.005	0.002	[−0.0097, −0.0015] *	11.8%
SocNet: pro-abst.	−0.003	0.004	[−0.0125, 0.0042]	9.8%	−0.006	0.003	[−0.0116, −0.0009] *	13.8%
SocNet: pro-drk.	−0.013	0.006	[−0.0277, −0.0025] *	42.3%	−0.008	0.002	[−0.0132, −0.0036] *	18.2%

Note: “adj. n” refers to the average number of participants who had data for the 8 structural variables;

^†percentage of total indirect effects attributable to specific mediators

^*p < 0.05 based on 95% confidence intervals using the Monte Carlo Method for Assessing Mediation (MCMAM) (MacKinnon, Lockwood, & Williams, 2004)