Table 2.

Blink duration for each task in ventilators and mean differences (M_D=Mr₁–Mr₂) with the results of post hoc multiple comparisons of blink duration.

Task	Mean blink rate for each task among ventilators			p	Post hoc tests with Bonferroni correction			p
	Evital 4	Servo I	Boaray 5000D
	Mean±SD	Mean±SD	Mean±SD		Mr1	Mr2	MD (Mr1–Mr2)
Task1: start the ventilator (second)	0.117±0.170	0.101±0.019	0.101±0.009	p<.01	Servo I	Evital 4	−0.016	0.01
					Boaray 5000D	Evital 4	−0.016	0.02
					Servo I	Boaray 5000D	0.000	1.00
Task2: mode and setting parameters recognition (second)	0.097±0.014	0.123±0.026	0.111±0.026	0.02	Servo I	Evital 4	0.026	0.02
					Boaray 5000D	Evital 4	0.014	0.40
					Servo I	Boaray 5000D	0.012	0.65
Task3: ventilator monitoring values recognition (second)	0.091±0.010	0.123±0.010	0.111±0.020	p<.01	Servo I	Evital 4	0.032	p<.01
					Boaray 5000D	Evital 4	0.020	0.01
					Servo I	Boaray 5000D	0.012	1.00
Task4: ventilator setting parameters modification (second)	0.104±0.018	0.123±0.034	0.114±0.027	0.45
Task5: ventilator mode modification (second)	0.093±0.014	0.118±0.021	0.112±0.018	0.01	Servo I	Evital 4	0.025	0.01
					Boaray 5000D	Evital 4	0.019	0.28
					Servo I	Boaray 5000D	0.006	0.75
Task6: alarm parameter recognition and resetting (second)	0.094±0.013	0.109±0.019	0.118±0.022	0.03	Servo I	Evital 4	0.015	0.23
					Boaray 5000D	Evital 4	0.024	0.04
					Servo I	Boaray 5000D	−0.009	1.00
Task7: respond to alarm (second)	0.097±0.023	0.112±0.025	0.104±0.023	0.29
Average blink duration of all tasks (second)	0.099±0.009	0.116±0.013	0.111±0.009	p<.01	Servo I	Evital 4	0.017	0.01
					Boaray 5000D	Evital 4	0.005	0.01
					Servo I	Boaray 5000D	0.012	1.00

Positive M_D values representing Mr₁ lower workload than Mr₂.