Table 2

Association of dyspnoea measurements with detection of hypoxaemia

Dyspnoea measurementNon-hypoxic patients (O2 sat >95%)Hypoxic patients (O2 sat <95%)P value
Shortness of breath1480.046*
Breathing faster at rest301.00
Breathing harder than normal201.00
More breathless today than yesterday310.57
mMRC dyspnoea scale
 >0970.014*
 >1150.001*
 >2150.001*
 >3110.37
Roth Score: maximum count
 <12010.21
 <15320.27
 <20520.60
 <28621.00
Roth Score: count time
 <8 s110.39
 <15 s1020.60
 <20 s1220.27
 <25 s1330.53
  • *The significance level is 0.05.

  • mMRC, modified Medical Research Council.