Table 5 Frequency of tumours from direct access CT grouped based on Kernick referral criteria. Odds ratio with 95% CI for each flag symptom, for the presence of a brain tumour
Brain tumour | ||||||||
|---|---|---|---|---|---|---|---|---|
Total | Absent | Present | ||||||
Freq | % | Freq | % | Odds ratio | 95% CI | PPV | ||
Red flag symptoms | 1141 | 1109 | 92 | 32 | 3.7 | 5.73 | 2.21–14.84 | 2.8 |
Orange flag symptoms | 728 | 723 | 99 | 5 | 0.7 | 1.34 | 0.38–4.68 | 0.7 |
Yellow flag symptoms | 1069 | 1064 | 99 | 1 | 0.09 | reference | 0.5 | |