Table 2

The 20 principal natural categories (PNCs) with highest resource use

PNCMean additional length of stay (days)No of adverse events in each PNCTotal number of extra days in hospital
PNCs were only included if there were at least five adverse events to which extra hospital stay had been attributed. Those PNCs shown in bold text are also represented in the 20 most frequent PNCs. Rarer PNCs also associated with higher resource use due to additional lengths of stay of greater than 10 days per case are “Wound infection following vascular graft procedure” (17 extra days, 5 cases), “Infected orthopaedic implanted prosthetic device” (15 days, 8 cases). and “Iatrogenic renal failure (non-drug induced) perioperative” (11 days, 5 cases). The average additional length of stay shown in the table has been rounded to the nearest whole day.
Ongoing pain/restricted movement following back surgery 2222474
No, delay, inadequate investigations ischaemic heart disease 1334451
Wound infection following peripheral procedure 1129314
Incisional hernia: post-procedural 1027271
Postoperative bowel obstruction/adhesions 1321271
Injury due to fall in nursing home 1219219
Failed/blocked/ruptured/ aneurysm, vascular grafts 1317215
Recurrent incisional hernia 920190
Pulmonary embolism postoperatively 822185
Wound infection following abdominal/retroperitoneal/pelvic procedure 535178
Catheter related urinary tract infection 537174
GI bleed secondary to NSAID 822167
Diagnosis delay/no/wrong, cancer large bowel159131
Failed hip replacement158120
Problems following radiation 715108
Stiffness/restricted movement following joint surgery11999
Pressure sore/decubitus ulcer 33298
Postoperative atelectasis/nosocomial pneumonia61596
Pancytopenia following chemotherapy11890
Bleeding related to warfarin therapy10987