Table 1

Postoperative mortality within 30 days of an acute and elective/waiting list procedure performed under general anaesthetic, for the total population and by demographic subgroup

AcuteElective/waiting list
ProceduresDeathsDeath rate (n/100)ProceduresDeathsDeath rate (n/100)
nnCrudeAge standardised (95% CI)nnCrudeAge standardised (95% CI)
Total procedures780 00912 2201.62 437 81444100.2
Procedure specialty
 Cardiovascular35 05515604.53.3 (3.2 to 3.5)97 19992410.7 (0.6 to 0.7)
 Digestive system185 46941852.32.1 (2 to 2.2)381 44315230.40.3 (0.3 to 0.3)
 Respiratory system12 08972366.3 (6.1 to 6.5)30 5573771.21 (1 to 1.1)
 Neurosurgery28 24311013.93.6 (3.5 to 3.8)66 4452550.40.4 (0.4 to 0.4)
 Musculoskeletal268 16034491.31 (0.9 to 1.1)585 9975040.10.1 (0.1 to 0.1)
 Urinary system19 1053691.91.4 (1.3 to 1.5)102 0592640.30.2 (0.1 to 0.2)
 Other231 8888330.40.6 (0.6 to 0.7)1 174 11456300.1 (0.1 to 0.1)
Procedure risk
 1 (lowest risk)140 3207760.60.8 (0.7 to 0.8)464 5422630.10.1 (0.1 to 0.1)
 2310 73520320.70.9 (0.8 to 1)1 252 39510010.10.1 (0.1 to 0.1)
 3238 08738171.61.2 (1.1 to 1.3)503 5486680.10.1 (0.1 to 0.1)
 463 63239436.24 (3.8 to 4.1)164 375158610.6 (0.6 to 0.7)
 5 (highest risk)27 23516526.15.1 (4.9 to 5.3)52 9548921.71.2 (1.2 to 1.3)
Age (years)
 <25260 3736090.2687 7782100
 25–49243 79410150.4715 4633220
 50–64120 77219271.6541 8298440.2
 65–7469 10924623.6300 34211500.4
 75+85 96162077.2192 40218841
Sex
 Female361 64158911.61.4 (1.4 to 1.5)1 301 35118950.10.2 (0.1 to 0.2)
 Male418 36763291.51.6 (1.5 to 1.7)1 136 44625150.20.2 (0.2 to 0.2)
Ethnicity
 Māori148 464149912.1 (2 to 2.2)305 8795850.20.4 (0.4 to 0.4)
 Pacific64 4035690.91.6 (1.5 to 1.7)113 7841680.10.3 (0.3 to 0.3)
 Asian36 2994291.21.7 (1.6 to 1.8)117 0841070.10.2 (0.1 to 0.2)
 European507 87894111.91.4 (1.3 to 1.5)1 777 70834170.20.2 (0.1 to 0.2)
 MELAA/Other22 9653121.41.4 (1.3 to 1.5)123 3591330.10.1 (0.1 to 0.1)
Deprivation (NZDep Decile)
 1–2112 02915441.41.3 (1.2 to 1.4)450 2395270.10.1 (0.1 to 0.1)
 3–4118 09517161.51.3 (1.2 to 1.4)427 0686100.10.1 (0.1 to 0.2)
 5–6140 10423841.71.5 (1.4 to 1.6)475 3988740.20.2 (0.1 to 0.2)
 7–8171 83030631.81.6 (1.5 to 1.7)526 36811360.20.2 (0.2 to 0.2)
 9–10222 01532911.51.8 (1.7 to 1.9)521 11811950.20.3 (0.2 to 0.3)
Rurality
 Urban580 02890111.61.5 (1.4 to 1.6)1 758 56430060.20.2 (0.2 to 0.2)
 Independent urban90 22418672.11.7 (1.6 to 1.9)317 1708520.30.2 (0.2 to 0.2)
 Rural93 28711171.21.3 (1.2 to 1.4)322 5514800.10.2 (0.1 to 0.2)
Comorbidity (M3 Index category)
 0494 47016180.30.6 (0.6 to 0.7)1 753 03142800 (0 to 0)
 >0–1196 78045162.31.6 (1.5 to 1.7)494 94015910.30.2 (0.2 to 0.2)
 >1–257 88632935.73.2 (3.1 to 3.4)123 863120110.7 (0.6 to 0.7)
 >2–324 16520498.55.6 (5.4 to 5.8)54 0429021.71.2 (1.1 to 1.2)
 ≥3670874411.17 (6.7 to 7.2)11 9382882.41.7 (1.7 to 1.8)
ASA score
 1–2484 6227160.10.3 (0.2 to 0.3)1 122 77648100.1 (0 to 0.1)
 3115 81535443.11.7 (1.6 to 1.9)226 28415650.70.4 (0.4 to 0.5)
 4–537 847545014.410.4 (10.1 to 10.7)25 97813135.13.8 (3.7 to 3.8)
 Not recorded141 72525101.81.8 (1.7 to 1.9)1 062 77610510.10.1 (0.1 to 0.1)
  • MELAA, Middle Eastern/Latin American/African.