Table 1

 Delta (end of shift minus start) sum scores based on principal component analysis

Baseline (B)Sound reflecting (SR)Sound absorbing (SA)F valueB-SR Post hoc pB-SA Post hoc pSR-SA Post hoc p
Results expressed as number of observations, means (M)/standard deviations (SD), 95% confidence limits of means (CI), and results of one way analyses of variance. Post hoc p values for analyses with three conditions (Fisher’s PLSD).
Morning shift n = 13n = 94n = 70
DemandM/SD−1.15/2.910.78/2.710.65/2.263.310.0110.0210.739
95%CI−2.74 to 0.430.23 to 1.330.12 to 1.18
Control/suppM/SD−0.67/1.55−0.38/1.58−0.82/1.511.600.5270.7610.078
95%CI−1.51 to 0.17−0.70 to −0.07−1.17 to −0.46
DistressM/SD0.06/1.180.03/0.910.710.868
95%CI−1.18 to 0.29−0.19 to 0.24
PressureM/SD1.48/2.771.34/2.839.420.758
95%CI0.92 to 2.040.68 to 2.01
StrainM/SD0.62/1.870.25/1.342.580.171
95%CI0.24 to 0.99−0.06 to 0.57
Afternoon shift n = 18n = 53n = 36
DemandM/SD−0.55/3.090.26/2.86−2.16/2.308.470.2820.0430.0001
95%CI−1.98 to 0.88−0.51 to 1.03−2.91 to −1.41
Control/suppM/SD−1.16/1.60−0.98/2.04−0.89/1.820.120.7300.6320.837
95%CI−1.90 to −0.42−1.53 to −0.43−1.49 to −0.30
DistressM/SD−0.05/1.15−0.39/0.881.870.116
95%CI−0.36 to 0.26−0.68 to −0.10
PressureM/SD0.25/3.17−1.73/2.294.960.003
95%CI−0.60 to 1.11−2.48 to −0.98
StrainM/SD0.08/2.02−0.85/1.882.450.029
95%CI−0.46 to 0.63−1.47 to −0.24
Night shift n = 46n = 53n = 37
DemandM/SD1.52/2.521.26/2.571.23/2.360.180.6110.6010.953
95%CI0.79 to 2.250.57 to 1.950.47 to 1.99
Control/suppM/SD0.18/1.460.20/1.310.29/0.810.090.9320.6920.742
95%CI−0.24 to 0.60−0.15 to 0.560.03 to 0.55
DistressM/SD0.16/0.890.17/1.631.360.957
95%CI−0.08 to 0.40−0.35 to 0.70
PressureM/SD1.49/2.641.32/2.440.200.785
95%CI0.78 to 2.200.53 to 2.11
StrainM/SD0.25/1.370.04/1.981.240.585
95%CI−0.12 to 0.62−0.60 to 0.67