The care unit in nursing home research: Evidence in support of a definition

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).

ISSN: 1471-2288