Table 3 The factors affecting bacterial counts in operating rooms using linear regression analysis
From: Factors influencing microbial colonies in the air of operating rooms
Variables | Pearson Correlation | Pearson Correlation p -value | Regression Coefficients | Regression Coefficients Standard Error | Regression Coefficients 95% CI* | Regression p-value |
|---|---|---|---|---|---|---|
Surgery time# (hour) | −.005 | .470 | −1.72 | 2.30 | −6.25-2.80 | .453 |
Surgery schedules (urgent surgery/regular surgery) | .093 | .071 | 3.66 | 8.57 | −13.21-20.54 | .669 |
Type of surgery (pediatric surgery / adult surgery) | .153 | .008 | 29.85 | 14.50 | 1.28–58.42 | .041 |
Site of procedure (deep incision and organ/space / superficial incision) | .164 | .005 | 20.19 | 6.07 | 8.24–32.14 | .001 |
Wound classification (contaminated and dirty/ clean and clean-contaminated) | .021 | .368 | 4.82 | 6.62 | −8.23-17.87 | .467 |
Indoor air temperature (°C) | .104 | .051 | 9.40 | 3.95 | 1.61–17.18 | .018 |
Indoor air relative humidity (%) | .001 | .499 | 1.32 | .81 | −0.27-2.91 | .104 |
Number of indoor staff (n) | .217 | <.001 | 4.93 | 1.75 | 1.47–8.38 | .005 |
Frequency of operating room door opening during a surgical procedure (n) | .109 | .043 | 7.28 | 3.77 | −0.15-14.70 | .055 |
Sequence of the operation during the day | .065 | .154 | 2.21 | 2.13 | −2.00-6.41 | .302 |
Time of sampling | .052 | .205 | 3.65 | 4.45 | −5.13-12.42 | .413 |
Surgical staging (before incision and after wound closure /during incision to wound closure) | .346 | <.001 | 36.50 | 5.96 | 24.76–48.25 | <.001 |