Substance Abuse Treatment, Prevention, and Policy

Table 9 Minimum sample sizes as the function of difference (denoted by Δ) for the 5 baseline question SSC model

From: New non-randomised model to assess the prevalence of discriminating behaviour: a pilot study on mephedrone

	Prevalence Rate
	0.05	0.1	0.15	0.2	0.25	0.3	0.35	0.4	0.45	0.5
	Standard Deviation (s)
	1.138	1.157	1.172	1.190	1.202	1.203	1.214	1.219	1.224	1.227
Effect Size (Δ)	Minimum Sample Size(n)
0.01	35063	36243	37157	38294	39129	39155	39914	40224	40548	40713
0.02	8766	9061	9289	9574	9782	9789	9979	10056	10137	10178
0.03	3896	4027	4129	4255	4348	4351	4435	4469	4505	4524
0.04	2191	2265	2322	2393	2446	2447	2495	2514	2534	2545
0.05	1403	1450	1486	1532	1565	1566	1597	1609	1622	1629
0.1	351	362	372	383	391	392	399	402	405	407
0.15	156	161	165	170	174	174	177	179	180	181
0.2	88	91	93	96	98	98	100	101	101	102
0.25	56	58	59	61	63	63	64	64	65	65
0.3	39	40	41	43	43	44	44	45	45	45
0.35	29	30	30	31	32	32	33	33	33	33
0.4	22	23	23	24	24	24	25	25	25	25
0.45	17	18	18	19	19	19	20	20	20	20
0.5	14	14	15	15	16	16	16	16	16	16

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ISSN: 1747-597X

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