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Table 1 Characteristics of cases and controls

From: An outbreak of multi-drug resistant Escherichia coli urinary tract infection in an elderly population: a case-control study of risk factors

  Cases Controls p*
(N = 76) (N = 156*)
n (%) n (%)
Gender    <0.001
Male 16 (21) 75 (48)  
Female 60 (78) 80 (51)  
Missing 0 1 (1)  
Age    0.005
65–74 14 (18) 52 (33)  
75–84 29 (38) 65 (42)  
85+ 33 (43) 37 (24)  
Missing 0 2 (1)  
Residence    <0.001
Own home 22 (29) 109 (70)  
Residential facility 53 (70) 47 (30)  
Missing 1 (1) 0  
Level of care    <0.001
Independent 25 (32) 104 (67)  
Assisted living 38 (50) 46 (30)  
High Dependency 12 (16) 6 (4)  
Missing 1 (1) 0  
Admitted to hospital in past year    0.01
Yes 54 (71) 84 (54)  
No 21 (28) 71 (46)  
Missing 1 (1) 1 (1)  
Diabetes    0.014
Yes 23 (30) 26 (17)  
No diabetes diagnosis 46 (61) 117 (75)  
Missing 7 (9) 13 (8)  
Catheterized in past year    <0.001
Yes 29 (38) 23 (15)  
No 38 (50) 109 (70)  
Missing 9 (12) 24 (15)  
Number of UTIs in past year    <0.001
None 0 (0) 77 (49)  
1 23 (30) 26 (17)  
2 25 (33) 15 (10)  
3+ 26 (34) 23 (15)  
Missing 2 (3) 15 (10)  
  1. * p value for Chi squared test calculated excluding missing values