Table 1
Expected and observed GP behaviour, by calprotectin result
| Expected referral behaviour (precalprotectin test result) | Calprotectin test result (µg/g) | Observed referral behaviour (postcalprotectin test result) | |
| No referral made | Referral made | ||
| GP not intending to refer the patient if calprotectin testing was unavailable=6% (11/195) | <100 | 60% (6/10) | 40% (4/10) |
| ≥100 | 0% (0/1) | 100% (1/1)* | |
| GP unsure whether to refer the patient if calprotectin testing was unavailable=33% (64/195) | <100 | 58% (31/53)* | 42% (22/53) |
| ≥100 | 27% (3/11) | 73% (8/11)* | |
| GP did intend to refer the patient if calprotectin testing was unavailable=53% (104/195) | <100 | 38% (33/88)* | 62% (55/88) |
| ≥100 | 12% (2/16) | 88% (14/16) | |
| Missing GP response =8% (16/195) | <100 | 50% (7/14) | 50% (7/14) |
| ≥100 | 0% (0/2) | 100% (2/2) | |
| Calprotectin likely saved referral | ||
| Referred: not influenced by calprotectin | |||
| Calprotectin likely added referral | |||
| Not referred: not influenced by calprotectin | |||
| Missing key | |||
*A negative calprotectin likely saved 64 referrals (33+31) while a positive calprotectin likely added 9 referrals (8+1) with a net saving of 55 referrals.
GP, general practitioner.