From: Validating estimates of problematic drug use in England
 | Frequency | Percent | Valid Percent | Percent excluding "don't know" | Mean PDU Estimate per 100,000 population |
---|---|---|---|---|---|
1.00 about right | 30 | 20 | 33 | 44 | 661 |
2.00 too low | 29 | 19 | 32 | 43 | 676 |
3.00 too high | 9 | 6 | 10 | 13 | 610 |
4.00 don't know | 22 | 15 | 24 | Â | 679 |
Total | 90 | 60 | 100 | 100 | 665 |
Missing | 59 | 40 | Â | Â | Â |
Total | 149 | 100 | Â | Â | Â |