Volume 18, Number 2—February 2012
CME ACTIVITY
Declining Guillain-Barré Syndrome after Campylobacteriosis Control, New Zealand, 1988–2010
, Amanda Kvalsvig, Jane Zhang, Rob Lake, Ann Sears, and Nick WilsonTable 1
Incidence of campylobacteriosis and GBS before and after intervention to reduce Campylobacter spp. in poultry, New Zealand 2002–2010*
| Incident condition | Before intervention, 2002–2006 |
After intervention, 2008–2010† |
Change |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Total no. | Average/year | Rate‡ | Total no. | Average/year | Rate‡ | Rate ratio (95% CI) | p value | |||
| Campylobacteriosis notifications§ | 69,207 | 13,841 | 339.4 | 21,217 | 7,072 | 163.8 | 0.48 (0.48–0.49) | <0.0001 | ||
| Campylobacteriosis hospitalizations¶ | 4,669 | 934 | 23.2 | 1,603 | 534 | 12.2 | 0.53 (0.51–0.54) | <0.0001 | ||
| GBS hospitalizations¶ | 513 | 103 | 2.6 | 290 | 97 | 2.2 | 0.87 (0.81–0.93) | 0.0496 | ||
*GBS, Guillain-Barré syndrome.
†Excludes 2007, which was a transitional year.
‡Annual no. cases/100,000 person-years at risk. Denominator populations based on mean population estimates published by Statistics New Zealand (www.stats.govt.nz/browse_for_stats/population/estimates_and_projections/national-pop-estimates.aspx). Campylobacteriosis and Guillan-Barré syndrome hospitalizations used age-standardized rates based on the age structure of the New Zealand 2006 Census of Population and Dwellings (www.stats.govt.nz/Census/2006CensusHomePage/classification-counts-tables/about-people/age.aspx).
§Published campylobacteriosis notification data (9).
¶Hospitalization data from New Zealand Ministry of Health.
