. 2018 Dec 15;24:9090–9101. doi: 10.12659/MSM.911853

Table 4.

The USE Questionnaire scores for each ventilator and mean differences (M_D=Mr₁–Mr₂) with the results of post hoc multiple comparisons of the USE Questionnaire scores.

User experience	The USE Questionnaire scores			P	Post hoc tests with Bonferroni correction			P

	Evital 4	Servo I	Boaray 5000D

	Mean±SD	Mean±SD	Mean±SD		Mr1	Mr2	M_D (Mr₁–Mr₂)
The overall average scores	4.894±0.981	5.684±0.900	5.328±0.747	p<.01	Servo I	Evital 4	0.790	p<.01

					Boaray 5000D	Evital 4	0.434	0.34

					Servo I	Boaray 5000D	0.356	0.34

Usefulness	4.885±0.961	5.878±1.032	5.360±0.716	p<.01	Servo I	Evital 4	0.993	p<.01

					Boaray 5000D	Evital 4	0.475	0.56

					Servo I	Boaray 5000D	0.518	0.10

Ease of use	4.976±1.028	5.688±0.811	5.221±0.795	0.06

Ease of learning	4.828±0.835	5.563±0.824	5.188±0.854	0.07

Satisfaction	4.812±1.155	5.527±1.035	5.536±0.764	0.03	Servo I	Evital 4	0.715	0.04

					Boaray 5000D	Evital 4	0.724	0.65

					Servo I	Boaray 5000D	−0.009	0.65

Positive M_D values representing Mr₁ lower workload than Mr₂.