Table 4: Characteristics of the ECT in nurses and controls.

BHRNursesOffice workers value*
( )( )

Moderate to severe BHR2 (4.2%)1 (2.1%)1.000
Mild BHR1 (2.1%)1 (2.1%)1.000
Borderline BHR3 (6.3%)2 (4.2%)1.000

Data are expressed as mean value with standard deviation.
BHR: bronchial hyperresponsiveness.
*Compared by Fisher’s exact test.