Estimation of the Impact of Meningococcal Serogroup C Universal Vaccination in Italy and Suggestions for the Multicomponent Serogroup B Vaccine Introduction

Table 2

Log-linear models fitted to three sources of data on meningococcal meningitis and the estimated number of cases in the Puglia region, within 2001–2013.

Models	df			AIC	BIC			95% CI for
Independent (no interaction)	3	114.63	0	108.63	108.79	29	242	229–260
Interaction (MIB^#, SIMI^##)	2	21.81	0	17.81	17.92	77	290	260–333
Interaction (MIB, HDR^###)	2	114.46	0	110.46	110.57	30	243	228–266
Interaction (SIMI, HDR)	2	87.01	0	83.01	83.12	6	219	214–231
Interaction (MIB, SIMI) and (MIB, HDR)	1	.58	.44	−1.42	−1.36	367	580	368–1,216
Interaction (MIB, SIMI) and (SIMI, HDR)	1	18.63	0	16.63	16.69	35	248	223–307
Interaction (MIB, HDR) and (SIMI, HDR)	1	84.92	0	82.92	82.97	5	218	213–228
Interaction (MIB, SIMI) and (MIB, HDR) and (SIMI, HDR)	0	0	1	0	0	244	457	271–1,225

df, degrees of freedom. , likelihood ratio statistic. value for the likelihood ratio statistic. AIC, Akaike Information Criterion. BIC, Bayesian Information Criterion. Estimate of the number of cases not reported to any source. Estimate of the total number of cases.
^#MIB, Invasive Bacterial Diseases Surveillance. ^##SIMI, Infectious Diseases Routine Notification System. ^###HDR, Hospital Discharge Registry.