Table 1

Audit results of performance indicators for staging EBUS across Manchester Cancer

SiteNetworkCentre 1Centre 2Centre 4
Audit period12121212
Staging EBUS40823433410042613273
Average LN/procedure1.91.71.91.71.31.61.81.7
No. of LN stations sampled per procedure
 Missing1%0%0%0%5%0%3%0%
 05%5%5%8%11%3%0%1%
 128%39%24%29%48%49%50%44%
 243%40%45%41%32%38%35%41%
 ≥324%16%27%22%5%10%13%14%
LN station sampled
 4R31%53%30%56%39%47%35%55%
 4L13%29%13%27%16%23%16%36%
 731%62%31%78%40%66%19%38%
True positive1861151603910301646
True negative179911495418241213
False negative32192477616
Missing data109007138
Sensitivity85%86%87%85%59%83%94%88%
Sensitivity 95% CI (%)80 to 9078 to 9181 to 9171 to 9333 to 8167 to 9369 to 10076 to 95
NPV85%83%86%89%72%80%92%68%
NPV 95% CI (%)79 to 8974 to 8980 to 9177 to 9550 to 8761 to 9262 to 10043 to 86
Overall prevalence of N2/352%55%55%46%49%60%53%71%
  • Numbers in bold highlights the data for the network as a whole, compared to the individual centres.

  • EBUS, endobronchial ultrasound; LN, lymph node; NPV, negative predictive value.