Volume 7, Number 6—December 2001
Research
Effect of Prevention Measures on Incidence of Human Listeriosis, France, 1987-1997
Table 2
Number of listeriosis cases by category of patient in 1987 and 1997, France: comparison of results from the total data set of two surveys and from a subset of hospitals reporting cases in both surveys
1987a | 1997 b | Percent changec | 1987a | 1997b | Percent change | |
---|---|---|---|---|---|---|
Pregnancy-associated | 336 | 58 | -83 | 166 | 25 | -85 |
No predisposing condition; <65 years of age | 66 | 13 | -80 | 36 | 6 | -84 |
Predisposing condition; >65 years of age | 51 | 22 | -57 | 19 | 8 | -58 |
Predisposing condition | 208 | 148 | -29 | 112 | 85 | -24 |
Total | 661 | 241 | -64 | 333 | 124 | -63 |
aHospital laboratory survey.
bNational Reference Center.
cThe percent change in number of cases has been calculated instead of the percent change in incidence, to facilitate comparison with the figures from the subset of hospitals. As a result, the figures on percent change are slightly lower than those in Table 1, which take into account the increase in the French population during the 10-year period.