Hospital discharges-based search of acute flaccid paralysis cases 2007–2016 in Italy and comparison with the National Surveillance System for monitoring the risk of polio reintroduction

Table 1 Acute flaccid paralysis cases and incidence rates, Italy 2007–2016

ICD-9-CM diagnosis codes			045.0		045.1		357.0		359.9		323.9
Year	AFP	IR	N	%	N	%	N	%	N	%	N	%
2007	457	5.5	0	0.0	0	0.0	117	25.5	171	37.3	169	36.9
2008	463	5.5	0	0.0	0	0.0	95	20.5	217	46.9	152	32.8
2009	473	5.6	0	0.0	0	0.0	101	21.3	196	41.4	176	37.1
2010	434	5.1	0	0.0	0	0.0	110	25.2	195	44.7	130	29.8
2011	443	5.2	0	0.0	0	0.0	113	25.5	190	42.9	140	31.6
2012	412	4.9	0	0.0	0	0.0	88	21.4	171	41.5	155	37.6
2013	378	4.5	0	0.0	0	0.0	84	22.2	174	46.0	120	31.7
2014	390	4.6	0	0.0	1	0.3	93	23.8	166	42.6	130	33.3
2015	339	4.0	0	0.0	0	0.0	62	18.3	162	47.8	116	34.2
2016	374	4.5	0	0.0	0	0.0	93	24.9	161	43.0	120	32.1
2007–2016	4163	5.0	0	0.0	1	0.0	956	23.0	1803	43.3	1408	33.8

Data were extracted from Hospital Discharge Records [5]
Italian population data were obtained from ISTAT database (www.demo.istat.it)
Five cases presented more than one diagnosis
ICD-9-CM diagnosis codes: 045.0 “Acute paralytic poliomyelitis specified as bulbar“;
045.1 “Acute poliomyelitis with other paralysis“; 357.0 “Acute infective polyneuritis”;
359.9 “Myopathy, unspecified”; 323.9 “Unspecified causes of encephalitis, myelitis, and encephalomyelitis”
357.0 code approximates Guillain-Barré Syndrome; 359.9 code approximates Flaccid paralysis; 323.9 code approximates Acute transverse myelitis
AFP acute flaccid paralysis, IR incidence rate × 100,000

ISSN: 1471-2458