Table 3

Performance of original and modified Manchester Triage System (MTS)

DataHospitalPatients (n)High urgency MTS*High urgency reference standard*Sensitivity*Specificity*DOR
Original MTS
Dataset 1 (13) (2006–2007)Overall13 554235.263 (59–66)79 (79–80)6.5 (5.5–7.6)
University hospital663119.65.967 (63–72)83 (82–84)10.5 (8.3–13.1)
General hospital692326.14.657 (51–62)75 (74–76)4.1 (3.2–5.1)
Modified MTS
Dataset 2 (2007–2008)Overall11 26016.15.464 (60–68)87 (86–87)11.5 (9.6–14)
University hospital615315.75.267 (62–72)87 (86–88)14 (15–18)
General Hospital510716.65.560 (54–66)86 (85–87)9.2 (7.2–12)
  • * Numbers present percentages, the five urgency levels are dichotomised into high urgency 1–2 and low urgency 3–5.

  • DOR, Diagnostic OR=(sensitivity/1-sensitivity)/(1-specificity/specificity).

  • p<0.05 modified MTS versus original MTS; all comparisons are made for both hospitals and per hospital.