Table 3 levels in different theaters

From: Assessment of noise pollution and its effect on patients undergoing surgeries under regional anesthesia, is it time to incorporate noise monitoring to anesthesia monitors: an observational cohort study

 General surgeryUrological surgeryObstetric surgeryOphthalmic surgeryEmergency surgeryOrthopedic surgeryP value
Background Noise50.3 (± 3.8)48.84 (± 3)51.82 (± 2.7)48.98 (± 2.6)49.84 (± 4.3)49.84 (± 2.4)0.408
Max (TM-102)90.3 (± 3.3)91.56 (± 4.4)90.67 (± 5.9)85.82 (± 4.3)93.62 (± 5.3)97.26 (± 5.8)0.018*
Min (TM-102)57.2 (± 3.1)61.64 (± 5.7)58.35 (± 1.7)51.67 (± 4.6)56.16 (± 4.5)57.3 (± 1.2)0.04*
Average (TM 102)71.46 (± 2.9)73.37 (± 2.6)77.68 (± 2.5)65.54 (± 5)78.82 (± 2.2)77 (± 3.1)< 0.001*
Max (NoiseCapture)91.27 (± 4.1)90.7 (± 6.1)93.27 (± 6.5)83.97 (± 4.2)96.26 (± 3.6)96.38 (± 5.5)0.002*
Min (NoiseCapture)52.75 (± 4.6)51.94 (± 5.2)53.53 (± 4.3)47.14 (± 3.8)57.52 (± 4)54.92 (± 3.2)0.007*
Average (NoiseCapture)72.78 (± 4.9)69.51 (± 5.3)78.17 (± 3.9)63.98 (± 4)77.14 (± 1.6)77.3 (± 1.1)< 0.001*
LA 50 (NoiseCapture)59.62 (± 4.59)62.20 (± 4.10)65.27 (± 2.93)56.78 (± 3.22)64.14 (± 4.73)64.88 (± 3.49)0.004*
LA 90 (NoiseCapture)60.18 (± 6.29)60.31 (± 8.31)64.18 (± 6.00)51.48 (± 4.58)64.32 (± 6.19)65.50 (± 2.37)0.005
  1. Data presented as mean (± SD). Max, maximum values in dB of A-weighting on fast response time mode recorded by both devices during the study period; Min, minimum values in dB of A-weighting on fast response time mode recorded by both devices during the study period; LA 90, the A-weighted noise level that is exceeded for 90% of the measurement period (a useful descriptor to quantify the background noise level); LA50, the A-weighted noise level that is exceeded for 50% of the measurement period
  2. *Significant statistical difference