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. 2021 Dec 31;72(714):34–37. doi: 10.3399/bjgp22X718217

Box 1.

Definitions of referral metrics

  • Two Week Wait (TWW) referral rate: number of TWW referrals divided by the population multiplied by 100 000.

  • Conversion rate: percentage of TWW referrals that resulted in a diagnosis of cancer (equivalent to the positive predictive value for cancer among patients selected for urgent referral).

  • Detection rate: percentage of new cancer cases treated resulting from a TWW referral (equivalent to the sensitivity of selection of patients for urgent referral).