Table 3. Factor analysis of GP quality leads' views on clusters.

Cluster item	Factor 1a	Factor 2a
Well organised	0.869	0.140
Friendly	0.829	0.029
Well facilitated	0.883	0.164
Productive	0.816	0.263
Data	0.112	0.823
Health intelligence	0.068	0.852
Analysis	0.078	0.863
Quality improvement	0.138	0.831
Advice	0.232	0.798
Leadership	0.302	0.725
Evaluation and research	0.106	0.787

Bartlett's test of sphericity = P<0.001.

KMO measure of sampling adequacy = 0.896.

^aHigh factor loadings identify a single construct, which means the items within it can be legitimately aggregated to give a total score.