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∗ | G 2† | p ‡ | AIC∗∗ | BIC∗∗∗ | x § | N ¶ | 95% CI for N ¶ |
|---|---|---|---|---|---|---|---|---|
| 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. † G 2, likelihood ratio statistic. ‡ p 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.