Risk Factors | Number | Without Infection | With Infection | χ2 | P | ||
---|---|---|---|---|---|---|---|
N | % | N | % | ||||
Sex | 28.49 | <.0001 | |||||
Male | 492 | 414 | 84.15 | 78 | 15.85 | ||
Female | 314 | 214 | 68.15 | 100 | 31.85 | ||
Age groupa | 9.35 | 0.0093 | |||||
<40 | 252 | 194 | 76.98 | 58 | 23.02 | ||
40-60 | 409 | 334 | 81.66 | 75 | 18.34 | ||
>60 | 145 | 100 | 69.66 | 45 | 31.03 | ||
Stone site | 54.06 | <.0001 | |||||
Single stone | 615 | 516 | 83.90 | 99 | 16.10 | ||
Multiple sites | 191 | 112 | 58.64 | 79 | 41.36 | ||
Obstruction | 7.38 | 0.0066 | |||||
Yes | 394 | 291 | 73.86 | 103 | 26.14 | ||
No | 412 | 337 | 81.80 | 75 | 18.20 | ||
Staghorn calculi | 28.06 | <.0001 | |||||
Staghorn stones | 64 | 33 | 51.56 | 31 | 48.44 | ||
Non-Staghorn stones | 742 | 595 | 80.19 | 147 | 19.81 | ||
Smoking | 3.44 | 0.0638 | |||||
Yes | 279 | 207 | 74.19 | 72 | 25.81 | ||
No | 527 | 421 | 79.89 | 106 | 20.11 | ||
Alcohol Drinking | 0.016 | 0.9006 | |||||
Yes | 293 | 229 | 78.16 | 64 | 21.84 | ||
No | 513 | 399 | 77.78 | 114 | 22.22 |