A Convergent validity: acoustic analysis v stethoscope | |||||||||
---|---|---|---|---|---|---|---|---|---|
Wheeze | Rattles | Crackles | |||||||
Yes | No | Total | Yes | No | Total | Yes | No | Total | |
Yes | 38 | 27 | 65 | 45 | 35 | 80 | 21 | 24 | 45 |
No | 18 | 17 | 35 | 8 | 12 | 20 | 6 | 49 | 55 |
Total | 56 | 44 | 100 | 53 | 47 | 100 | 27 | 73 | 100 |
κ = 0.07 (−0.13 to 0.26) | κ = 0.11 (−0.05 to 0.27) | κ = 0.36 (0.18 to 0.54) |
B Discriminant validity: stethoscope | |||||||||
---|---|---|---|---|---|---|---|---|---|
Wheeze v rattles | Wheeze v crackles | Rattles v crackles | |||||||
Yes | No | Total | Yes | No | Total | Yes | No | Total | |
Yes | 30 | 26 | 56 | 12 | 42 | 54 | 8 | 44 | 52 |
No | 22 | 22 | 44 | 15 | 31 | 46 | 19 | 29 | 48 |
Total | 52 | 48 | 100 | 27 | 73 | 100 | 27 | 73 | 100 |
κ = 0.01 (−0.18 to 0.21) | κ = −0.1 (−0.27 to 0.07) | κ = −0.24 (−0.4 to 0.07) |
C Discriminant validity: acoustic analysis | |||||||||
---|---|---|---|---|---|---|---|---|---|
Wheeze v rattles | Wheeze v crackles | Rattles v crackles | |||||||
Yes | No | Total | Yes | No | Total | Yes | No | Total | |
2×2 tables demonstrating convergent and discriminant validity; κ (95% confidence interval) given for each comparison. | |||||||||
Yes | 55 | 10 | 65 | 27 | 38 | 65 | 32 | 50 | 82 |
No | 24 | 11 | 35 | 15 | 20 | 35 | 10 | 8 | 18 |
Total | 79 | 21 | 100 | 42 | 58 | 100 | 42 | 58 | 100 |
κ = 0.16 (−0.02 to 0.33) | κ = −0.03 (−0.19 to 0.16) | κ = −0.13 (−0.2 to 0.05) |