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Volume 10, Number 5—May 2004

Research

Virulence Factors for Hemolytic Uremic Syndrome, Denmark1

Steen Ethelberg*Comments to Author , Katharina E. P. Olsen*, Flemming Scheutz*†, Charlotte Jensen*, Peter Schiellerup*, Jørgen Engberg*, Andreas Munk Petersen*, Bente Olesen*, Peter Gerner-Smidt*, and Kåre Mølbak*
Author affiliations: *Statens Serum Institut, Copenhagen, Denmark; †The World Health Organization International Escherichia Centre, Copenhagen, Denmark

Main Article

Table 4

Risk factors for bloody diarrhea among 343 STEC patients, Denmark, 1997–2003a

Univariate analysis Multivariate analysis
Determinant
No. of patients
No. (%) with BD
OR
95% CI
OR
95% CI
eae
Negative
111
17 (15.3)
1

1

Positive
232
108 (46.6)
4.8
2.7 to 8.6
6.0
2.7 to 13.3
stx2
Negative
159
41 (25.8)
1

1

Positive
184
84 (45.7)
2.4
1.5 to 3.8
2.5
1.2 to 5.1
O157
No
262
69 (26.3)
1

1

Yes
81
56 (69.1)
6.3
3.6 to 10.8
2.7
1.2 to 5.7
O103
No
298
104 (34.9)
1

1

Yes
45
21 (46.7)
1.6
0.9 to 3.1
2.8
1.2 to 6.3
ehxA
No
79
15 (19.0)
1



Yes
264
110 (41.7)
3.0
1.7 to 5.6
NS

Ageb - - - - 1.3 1.2 to 1.5

aSTEC, Shiga toxin–producing Escherichia coli; BD, bloody diarrhea; OR, odds ratio; CI, confidence intervals; NS, not statistically significant.
bCalculated for an increase in age of 10 years.

Main Article

1Presented in part at the VTEC2003, 5th International Symposium on “Shiga Toxin (Verocytotoxin) Producing Escherichia coli Infections,” Edinburgh, Scotland, June 2003 (abstract O-6).

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