. 2011 Apr 14;11:46. doi: 10.1186/1471-2288-11-46

Table 3.

Aggregation measures (n = 25 nursing homes)

Dimension	F	BMS	WMS	ICC1	ICC2	η2	ω2	PROB
UNIT LEVEL AGGREGATION

Leadership	2.1733	0.7596	0.3495	0.0768	0.5399	0.1417	0.0765	0.0000

Culture	2.9261	0.7410	0.2533	0.1201	0.6582	0.1814	0.1193	0.0000

Evaluation	2.3907	0.7391	0.3092	0.0897	0.5817	0.1540	0.0895	0.0000

Social Capital	1.7570	0.4074	0.2319	0.0509	0.4308	0.1181	0.0508	0.0000

Formal Interactions	1.5716	0.8838	0.5624	0.0389	0.3637	0.1064	0.0387	0.0009

Informal Interactions	1.3070	3.3072	2.5304	0.0213	0.2349	0.0906	0.0213	0.0342

Structural and Electronic Resources	2.5201	6.8517	2.7189	0.0972	0.6032	0.1612	0.0972	0.0000

OS-staff	7.8907	7.3179	0.9274	0.3281	0.8733	0.3728	0.3254	0.0000

OS-space	7.7267	5.4560	0.7061	0.3228	0.8706	0.3685	0.3207	0.0000

OS-time	4.9345	2.8298	0.5735	0.2180	0.7973	0.2724	0.2170	0.0000

NURSING HOME LEVEL AGGREGATION

Leadership	3.7238	1.3391	0.3596	0.0521	0.7315	0.0682	0.0498	0.0000

Culture	7.0012	1.8055	0.2579	0.1079	0.8572	0.1205	0.1032	0.0000

Evaluation	4.5091	1.4341	0.3181	0.0661	0.7782	0.0815	0.0634	0.0000

Social Capital	3.2422	0.7592	0.2342	0.0432	0.6916	0.0600	0.0415	0.0000

Formal Interactions	2.6004	1.4760	0.5676	0.0313	0.6154	0.0485	0.0298	0.0000

Informal Interactions	2.0836	5.2765	2.5324	0.0214	0.5201	0.0394	0.0205	0.0017

Structural and Electronic Resources	5.8401	16.0841	2.7541	0.0889	0.8288	0.1032	0.0855	0.0000

OS-staff	23.9814	22.9152	0.9555	0.3166	0.9583	0.3184	0.3050	0.0000

OS-space	22.1040	16.3660	0.7404	0.2985	0.9548	0.3015	0.2877	0.0000

OS-time	14.6247	8.4892	0.5805	0.2155	0.9316	0.2229	0.2075	0.0000

F = test statistic from one-way analysis of variance (ANOVA)

The source table from ANOVA was used to calculate Interclass correlation 1 (ICC 1), Interclass correlation 2 (ICC 2), Eta Square (η²), and Omega Square (ω²) as follows:

1. ICC(1) = (BMS - WMS)/(BMS + [K - 1] WMS), where BMS is the between-group mean square, WMS is the within-group mean square, and K is the number of subjects per group. The average K for unequal group size was calculated as K = (1/[N - 1]) (ΣK - [ΣK²/ΣK]);

2. ICC(2) = (BMS - WMS)/BMS;

3. η2 = SSB/SST, where SSB is the sum of squares between groups and SST is the sum of squares total; and

4. ω²= (SSB - [N - 1] WMS)/(SST + WMS).