Table 4 Range, measurement error, and difference across the five measurements for each PEF of the peak expiratory flow meters evaluated.
From: Experimental verification and comparative analysis of peak expiratory flow measuring devices
Model | \(\:{\stackrel{-}{q}}_{n}\:\)Average PEF (L/min) | \(\:{q}_{ref,n}\)Ref. PEF (L/min) | \(\:{r}_{n}\) Range (L/min) | \(\:{e}_{n}\:\)Error (L/min) | \(\:d\:\)Linearity (%) |
|---|---|---|---|---|---|
Model I | 70.74 | 59.40 | 15 | 11.34 | −8.85% |
125.00 | 102.60 | 0 | 22.40 | −11.10% | |
253.99 | 203.40 | 5 | 50.59 | 5.64% | |
336.99 | 305.40 | 5 | 31.59 | 7.76% | |
407.94 | 408.00 | 20 | −0.06 | −3.77% | |
514.98 | 495.60 | 10 | 19.38 | 10.83% | |
566.99 | 609.00 | 5 | −42.01 | 10.76% | |
583.98 | 688.80 | 10 | −104.82 | − | |
Model II | 56.95 | 59.40 | 5 | −2.45 | −1.79% |
101.97 | 102.60 | 5 | −0.63 | 1.39% | |
200.00 | 203.40 | 0 | −3.40 | 1.01% | |
298.99 | 305.40 | 5 | −6.41 | −1.08% | |
406.00 | 408.00 | 5 | −2.00 | −1.48% | |
501.00 | 495.60 | 5 | 5.40 | 16.81% | |
525.98 | 609.00 | 10 | −83.02 | 6.65% | |
567.99 | 688.80 | 5 | −120.81 | − | |
Model III | 40.00 | 59.40 | 0 | −19.40 | −11.42% |
93.93 | 102.60 | 10 | −8.67 | −5.01% | |
205.00 | 203.40 | 0 | 1.60 | 0.99% | |
303.99 | 305.40 | 5 | −1.41 | −2.63% | |
417.59 | 408.00 | 5 | 9.59 | −2.85% | |
520.00 | 495.60 | 0 | 24.40 | 13.93% | |
555.97 | 609.00 | 15 | −53.03 | 6.14% | |
599.00 | 688.80 | 5 | −89.80 | − | |
Model IV | 68.97 | 59.40 | 5 | 9.57 | 3.89% |
107.97 | 102.60 | 5 | 5.37 | −2.44% | |
213.99 | 203.40 | 5 | 10.59 | 9.34% | |
288.99 | 305.40 | 5 | −16.41 | 4.71% | |
373.99 | 408.00 | 5 | −34.01 | −1.58% | |
469.00 | 495.60 | 5 | −26.60 | 6.48% | |
546.97 | 609.00 | 15 | −62.03 | 9.77% | |
571.00 | 688.80 | 5 | −117.80 | − | |
Model V | 80.00 | 59.40 | 0 | 20.60 | 23.26% |
99.95 | 102.60 | 10 | −2.65 | 5.11% | |
190.99 | 203.40 | 5 | −12.41 | 1.38% | |
288.99 | 305.40 | 5 | −16.41 | 0.41% | |
389.99 | 408.00 | 10 | −18.01 | −0.91% | |
481.96 | 495.60 | 15 | −13.64 | 19.55% | |
497.99 | 609.00 | 5 | −111.01 | 10.06% | |
524.98 | 688.80 | 10 | −163.82 | − | |
Model VI | 60.00 | 59.40 | 0 | 0.60 | 11.01% |
92.97 | 102.60 | 5 | −9.63 | 1.45% | |
190.99 | 203.40 | 5 | −12.41 | −5.18% | |
308.99 | 305.40 | 5 | 3.59 | 0.15% | |
410.98 | 408.00 | 10 | 2.98 | 2.80% | |
485.00 | 495.60 | 0 | −10.60 | 17.34% | |
509.99 | 609.00 | 10 | −99.01 | 13.86% | |
517,99 | 688,80 | 5 | −170.81 | − |
