Table 3. Antibiotic usage in NEC cases according to studied NICUs.

Ward	DOTs [day]	DOTs per number of NEC	DDDs [no]	DDDs per number of NEC
A	98	12.25	0.3	0.3
B	102	9.27	0.2	0.2
C	322	46.00	0.6	0.9
D	218	27.25	0.4	0.5
E	376	31.33	1.0	0.8
F	321	20.06	4.3	0.3
TOTAL	1 437	23.18	29.4	0.5

NEC – necrotizing enterocolitis; DDD – defined daily dose; DOTs – days of treatment;