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Table 3 All measurements with MECU exposure as reference. Data are adjusted for noise floor and DPOAE amplitude signal. All included participants had recordable emissions exceeding S/N of 7 dB at baseline. The listed values are changes (Δ) from baseline values. P < 0.05 in bold

From: Noise exposure during prehospital emergency physicians work on Mobile Emergency Care Units and Helicopter Emergency Medical Services

  Δ dB response at 2 kHz [95% CI] Δ dB response at 3 kHz [95% CI] Δ dB response at 4 kHz [95% CI] Number of measurements (per 2, 3 4 kHz)
MECU exposure [reference]
 Ambulance exposure −6 [−10;-3] 0 [−6;0] 0 [−5;4] 106 (39, 39, 28)
 HEMS exposure −6 [−13;0] −3 [−13;2] −7 [−17;1] 77 (39, 19, 19)
 In-hospital exposure 4 [−1;10] 1 [−11;7] 5 [−5;13] 52 (31, 6, 15)