Physician versus non-physician delivery of alcohol screening, brief intervention and referral to treatment in adult primary care: the ADVISe cluster randomized controlled implementation trial

Table 1 Screening rates by treatment arms in first year

	Average unique visits per month			Average screens per month			Average % screened			p value	Best month N screened			Best month % screened			p value
	PCP	NPP & MA	Control	PCP	NPP & MA	Control	PCP	NPP & MA	Control	p value	PCP	NPP &MA	Control	PCP	NPP & MA	Control	p value
Medical center
1	1464	2797	2928	41	1107	148	2.80	39.56	5.07	^a,b,c	161	1505	391	11.47	46.88	13.81	^a,b’,c
2	1088	1424	1392	51	824	24	4.67	57.84	1.73	^a,b,c	102	1039	68	9.31	66.65	5.00	^{a, b,c}
3	925	748	1779	58	197	403	6.28	26.33	22.64	^a,b,c	126	467	697	13.15	55.12	35.49	^a,b,c
4	4318	4536	1639	552	2962	4	12.77	65.29	0.26	^a,b,c	861	3681	23	19.79	71.71	1.18	^a,b,c
5	1569	884	1717	509	411	107	32.43	46.51	6.22	^a,b,c	635	723	235	37.90	64.21	14.61	^a,b,c
6	3124	7668	3372	177	3705	29	5.68	48.32	0.85	^a,b,c	332	5644	63	10.15	74.68	2.02	^a,b,c
7	3336	2452	1898	339	225	6	10.17	9.16	0.33	^a,b,c	980	636	25	26.04	29.42	1.49	^a,b,c’
8	3866	4067	5686	565	2778	167	14.62	68.32	2.94	^a,b,c	964	3355	350	28.41	75.48	5.81	^a,b,c
9	5111	955	2531	405	142	8	7.92	14.86	0.33	^a,b,c	608	254	41	12.36	31.59	1.76	^a,b,c
10	4297	5034	6031	345	2827	79	8.03	56.17	1.32	^a,b,c	637	3938	195	15.07	73.16	3.39	^a,b,c
11	6636	3715	3125	239	2223	138	3.60	59.85	4.41	^a,b,c	355	2586	443	5.04	70.78	15.08	^a,b,c
All	35,519	34,167	31935	3280	17397	1113	9.23	50.92	3.49	^a,b,c	3,729	20,445	1918	10.68	60.07	6.04	^a,b,c

Differences in screening rates between each of the two intervention arms vs. Control arm as well as between the two intervention arms were examined by hand calculating z statistics for comparisons of two proportions
^ap<0.0001, NPP & MA vs. Control; ^bp<0.0001, PCP vs. Control; ^b’p<0.05, PCP vs. Control; ^cp<0.0001, NPP & MA vs. PCP; ^c’p<0.01, NPP & MA vs. PCP

ISSN: 1940-0640