Table 3 Spirometry tests that did and did not meet the ATS/ERS acceptability and repeatability criteria (n = 149).
From: Quality of spirometry and related diagnosis in primary care with a focus on clinical use
LFT 1 | LFT 2 | |
|---|---|---|
ATS/ERS criteria met (acceptability and repeatability) | 20 (13.4) | 20 (13.4) |
ATS/ERS criteria not met | 102 (68.5) | 107 (71.8) |
ATS/ERS criteria not assessable | 27 (18.1) | 22 (14.8) |
Acceptability (three acceptable curves)a | 20 (13.4) | 20 (13.4) |
Good start of expiration (PEF reached quickly) | 55 (36.9) | 47 (31.5) |
Reached peak with maximal effort | 53 (35.6) | 58 (38.9) |
Smooth continuous exhalation | 87 (58.4) | 77 (51.7) |
Good exhalation (no pinching) | 94 (63.1) | 88 (59.1) |
No extra breaths being taken during manoeuvre | 142 (95.3) | 140 (94.0) |
Plateau (≥1 s < 0.025 L change in volume) | 101 (67.8) | 90 (60.4) |
Repeatabilityb | 136 (91.3) | 136 (91.3) |
Difference between two largest values of FEV1 ≤ 0.150 L | 146 (98.0) | 146 (98.0) |
Difference between two largest values of FVC ≤ 0.150 L | 136 (91.3) | 136 (91.3) |
Acceptability (≥2 acceptable curves) | 49 (32.9) | 49 (32.9) |
