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. 2022 Nov 22;12(11):e062463. doi: 10.1136/bmjopen-2022-062463

Table 1.

Study population characteristics the clinical data in the table above describe the overall population of the study

All m4a 3gp P value (m4a, 3gp)
Female Male Female Male
Participants (N)
 Total 296 107 80 51 58
Age (years)
 Mean (SD) 40.3 (12.6) 38.8 (13.4) 42.9 (12.7) 37.8 (11.6) 41.5 (11.3) 0.28
Body mass index (kg/m²)
 Mean (SD) 24.1 (4.7) 24.6 (5.5) 26.5 (4.1) 24.1 (3.8) 26.6 (4.17) 0.95
Antibiotic (%)
 No 265 (90) 93 (87) 73 (91) 44 (86) 55 (95) 0.87
 Yes 31 (10) 14 (13) 7 (9) 7 (14) 3 (5)
Asthma (%)
 No 284 (96) 104 (97) 75 (94) 47 (92) 58 (100) 0.82
 Yes 12 (4) 3 (3) 5 (6) 4 (8) 0 (0)
Smoking (%)
 Never 199 (67) 77 (72) 51 (64) 36 (71) 35 (60) 0.41
 Former smoker 53 (18) 19 (18) 20 (25) 9 (18) 13 (22)
 Current smoker 44 (15) 11 (10) 9 (11) 6 (11) 10 (18)
Audio recordings
 Total 1772 584 499 345 344 <0.001
 No Fatigue 1222 (69) 394 (67) 370 (74) 190 (55) 268 (78)
 Fatigue 550 (31) 190 (33) 129 (26) 155 (45) 76 (22)
Mean (SD) and maximum of audio recording per participant in the 14-day follow-up period
 Mean (SD) 6 (5) 6 (5) 6 (5) 6 (5) 6 (5)
 Max 16 14 16 15 14

The total number and its percentage are used to represent all categorical data. The table summarises general information for describing audio data. All p values comparing iOS (m4a) and Android users (3gp) were calculated using χ2 test and Student’s t-test.