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Table 5 Risk factors associated to Legionella isolation in multivariate logistic regression analysis

From: Legionella control in the water system of antiquated hospital buildings by shock and continuous hyperchlorination: 5 years experience

Risk factors

Parameters

OR

95% CI

p-value

Water temperature°C

≥20°C - ≤45°C

11.96

1.28 - 111.48

0.0293

 

<20°C or > 45°C

Residual free chlorine concentration mg/L

< 0.5

12.97

1.37 - 123.17

0.0256

 

≥ 0.5

Potability of water according to regulation

Not potable water

3.57

0.77 - 16.65

0.1052

 

Potable water

No continuous vs. continuous hyperchlorination

No continuous hyperchlorination

10.30

1.06 - 100.05

0.0444

 

Continuous hyperchlorination