TABLE 3.

Characteristics of qnr-positive and qnr-negative isolates

CharacteristicNo. with characteristic/total no. with qnr result (%)Odds ratio (95% confidence interval)P valuea
PositiveNegative
Patient characteristics
    Age of ≥65 yr22/70 (31)77/196 (39)0.7 (0.4-1.3)0.25
    Male38/71 (53)102/194 (53)1.0 (0.6-1.8)1
    Inpatient49/68 (72)111/191 (58)1.86 (1.0-3.4)0.04
Strain characteristicsb
    K. pneumoniae
        CIP resistant13/21 (62)62/85 (73)0.6 (0.2-1.6)0.42
        GEN resistant12/21 (57)50/85 (59)0.9 (0.4-2.5)1
        SXT resistant17/21 (81)67/85 (79)1.1 (0.3-3.8)1
    Enterobacter spp.
        CIP resistant35/50 (70)71/110 (65)1.28 (0.6-2.6)0.59
        GEN resistant43/50 (86)38/110 (35)11.6 (4.8-28.4)<0.001
        SXT resistant47/50 (94)46/110 (42)21.8 (6.4-74.0)<0.001
  • a P values were determined by Fisher's two-tailed exact test.

  • b CIP, ciprofloxacin; GEN, gentamicin; SXT, trimethoprim-sulfamethoxazole.