TABLE 4.

Association of hra among 496 UPEC and 165 rectal isolates in the presence or absence of hly

UTI collectionORa (95% confidence interval)Breslow Day P value
Crudehly absenthly present
All UTI (n = 496)3.3 (2.2-4.9)2.9 (1.8-4.5)1.2 (0.4-3.5)0.13
First UTI (Michigan) (n = 96)2.9 (1.7-5.0)3.5 (1.9-6.6)0.7 (0.1-2.3)0.02
UTI 40-65 (n = 90)3.5 (2.0-6.0)4.4 (2.4-8.5)0.7 (0.2-2.4)0.01
Pyelonephritis (n = 148)5.0 (3.1-8.2)4.2 (2.3-7.6)1.8 (0.6-5.8)0.20
Recurring UTIb (n = 61)3.2 (1.7-6.0)1.3 (0.5-3.0)3.2 (0.7-13.2)0.30
First UTI (Texas)b (n = 91)1.9 (1.1-3.3)1.0 (0.5-2.1)1.0 (0.3-3.3)0.98
  • a OR, odds ratio.

  • b Low number of hly-positive and hra-negative strains (10 of 47 strains in recurring-UTI isolates and 19 of 58 strains in first-UTI [Texas] isolates were hly+ hra).