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Table 4 Pre-PFT questionnaires of BPTs

From: Clinical analysis of the “small plateau” sign on the flow-volume curve followed by deep learning automated recognition

Parameter BPT (+) P value BPT (−) P value
SP sign (+)
(N = 205)
SP sign (−)
(N = 3961)
SP sign (+)
(N = 1124)
SP sign (−)
(N = 4624)
Smoking status, n (%)    .348    < .0001
 Current or former smoker 23 (11%) 535 (14%)   155 (15%) 888 (19%)  
 Never smoker 182 (89%) 3426 (86%)   969 (86%) 3753 (81%)  
Chronic cough, n (%)    < .0001    < .0001
 Rare 49 (24%) 1428 (36%)   171 (15%) 1176 (25%)  
 Sometimes 156 (76%) 2533 (64%)   947 (85%) 3448 (75%)  
Sputum production, n (%) 105/205
(51%)
1967/3961
(50%)
.663 568/1124
(51%)
2478/4624
(54%)
.066
Wheezing, n (%) 77/205
(38%)
1209/3961
(31%)
.033 342/1124
(30%)
865/4624
(19%)
< .0001
PFT indication, n (%)       
 Cough 61/205
(30%)
1345/3961
(34%)
.360 663/1124
(59%)
2494/4624
(54%)
< .0001
 COPD 2/205
(1%)
152/3961
(4%)
.034 64/1124
(6%)
237/4624
(5%)
.443
 Asthma 162/205
(79%)
2098/3961
(53%)
< .0001 162/1124
(14%)
675/4624
(15%)
.875
 Bronchiectasis 5/205
(2%)
26/3961
(1%)
.016 46/1124
(14%)
90/4624
(2%)
< .0001
 ILD 0/205
(0%)
17/3961
(0%)
1.000 10/1124
(1%)
55/4624
(1%)
.394
 Rhinitis/sinusitis 50/205
(24%)
46/3961
(1%)
< .0001 147/1124
(13%)
50/4624
(1%)
< .0001
 Gastroesophageal reflux 2/205
(1%)
1/3961
(0.03%)
.007 15/1124
(1%)
3/4624
(0%)
< .0001
 Pneumonia 10/205
(5%)
29/3961
(0.7%)
< .0001 58/1124
(5%)
102/4624
(2%)
< .0001
 Shortness of breath 5/205
(2%)
65/3961
(2%)
.393 43/1124
(4%)
143/4624
(3%)
.213
 Chest distress 4/205
(2%)
35/3961
(1%)
.123 29/1124
(3%)
121/4624
(3%)
.945
 Othersa 4/205
(2%)
147/3961
(4%)
1.000 7/1124
(1%)
654/4624
(14%)
< .0001
  1. Data are presented as absolute numbers in the case of frequencies. P values < .05 were considered to represent a significant difference in prevalence between SP signs of the negative and positive BPT
  2. PFT, pulmonary function test; COPD, chronic obstructive pulmonary disease; ILD, interstitial lung disease
  3. aIndications include hypertension, coronary heart disease, diabetes, eosinophilic granulomatosis with polyangiitis, and studies without documented indication