Table 1

Rates in SMM indicators per 1000 deliveries in Sichuan province of China between 2016 and 2019

SMM indicators	2016	2017	2018	2019	Rate between 2016 and 2019
Overall SMM rate	35.80	28.05	34.57	33.86	33.08
1. Acute myocardial infarction	0.004	0.000	0.005	0.006	0.004
2. Aneurysm	0.000	0.005	0.005	0.011	0.005
3. Acute renal failure	0.329	0.029	0.032	0.033	0.116
4. Adult respiratory distress syndrome	0.017	0.034	0.021	0.033	0.026
5. Amniotic fluid embolism	0.208	0.149	0.117	0.120	0.152
6. Cardiac arrest/ventricular fibrillation	0.022	0.014	0.032	0.033	0.025
7. Conversion of cardiac rhythm	0.000	0.000	0.005	0.011	0.004
8. Disseminated intravascular coagulation	0.126	0.197	0.197	0.169	0.170
9. Eclampsia	1.491	1.167	1.272	1.097	1.268
10. Heart failure/arrest during surgery or procedure*	NA	NA	NA	NA	NA
11. Puerperal cerebrovascular disorders	0.052	0.053	0.101	0.071	0.068
12. Pulmonary oedema/acute heart failure	0.260	0.216	0.240	0.229	0.237
13. Severe anaesthesia complications	0.009	0.005	0.000	0.027	0.010
14. Sepsis	0.629	0.908	1.176	1.075	0.928
15. Shock	1.066	0.888	0.931	0.993	0.972
16. Sickle cell disease with crisis	0.000	0.000	0.000	0.000	0.000
17. Air and thrombotic embolism	0.030	0.048	0.069	0.076	0.054
18. Blood products transfusion	32.254	24.824	30.865	29.792	29.465
19. Hysterectomy	0.746	0.879	0.825	0.742	0.798
20. Temporary tracheostomy	0.000	0.000	0.000	0.000	0.000
21. Ventilation	0.000	0.014	0.256	1.004	0.290
Number of delivery cases	230 700	208 263	187 880	183 206	810 049

There was no ICD-10 code in China that could indicate heart failure/arrest during surgery or procedure. Hence, the tenth indicator was not able to be identified in our data.
ICD-10, International Classification of Diseases Tenth Revision; NA, not available; SMM, severe maternal morbidity.