Table 2 Positive predictive value estimates for weighted scoring applied to all respondents to 1995 postal survey (n = 6825)
Threshold Score | Number of individuals above threshold | Number eligible for review (no asthma diagnosis) | Undiagnosed individuals expected to be diagnosed clinically asthmatic | |
|---|---|---|---|---|
| Â | Â | Â | Number | Percent (Positive predictive value) |
11 | 76 | 13 | 12 | 90.5 |
10 | 178 | 33 | 31 | 94.2 |
9 | 335 | 80 | 75 | 93.5 |
8 | 577 | 195 | 161 | 82.5 |
7 | 891 | 394 | 310 | 78.8 |
6 | 1289 | 715 | 437 | 61.2 |
5 | 2098 | 1427 | 678 | 47.5 |
4 | 3332 | 2592 | 769 | 29.7 |
3 | 4667 | 3874 | 894 | 23.1 |
2 | 5769 | 4938 | 929 | 18.8 |
1 | 6524 | 5670 | 933 | 16.5 |
All respondents | 6825 | 5964 | 934 | 15.7 |