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Table 3 Ventilator performance in the UE/CC, NASA-TLX, and PSSUQ metrics

From: The usability of ventilators: a comparative evaluation of use safety and user experience

Ā 

Use error and close calls (% of tasks) Use safety

NASA-TLX (0ā€“100) Workload

PSSUQ (1ā€“7) System usability

Ventilator

Mean

Standard deviation

Mean

Standard deviation

Mean

Standard deviation

G5

12.8

10.7

28.3

20.5

2.7

1.3

PB980

13.2

11.9

43.7

21.9

3.5

1.5

SERVO-U

9.1

11.0

21.5

17.1

1.7

0.9

V500

16.9

14.1

34.6

20.8

3.1

1.4

  1. Lower scores on all three metrics correspond to better perception/performance
  2. UE/CC use error/close call, NASA-TLX National Aeronautics and Space Administration Task Load Index, PSSUQ Post-Study System Usability Questionnaire