Table 1.

Clustering of unique daily antimicrobial therapy patterns: distribution of frequencies of fuzzy domain subsets per antibiotic therapy cluster.

Cluster	N Patterns	Non-Null	F1	F2	F3	F4	F5
T0	3551	10,324	0.24	0.38	0.22	0.09	0.07
T1	1159	4437	0.11	0.49	0.10	0.11	0.20
T2	1569	4257	0.21	0.47	0.13	0.10	0.09
T3	1484	5739	0.16	0.34	0.14	0.14	0.22

Clusters of therapy are named from T0 to T3, fuzzy categories from F1 to F5. N-Patterns: number of unique antimicrobial day patterns per cluster. Non-null: Total number of non-null fuzzy subsets in the patterns. Chi-square value 1818.4; p < 0.05.