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. 2022 Aug 4;34(3):mzac063.
doi: 10.1093/intqhc/mzac063.

Trends of in-hospital and ICU mortality in COVID-19 patients over the fourth and fifth COVID-19 surges in Iran: a retrospective cohort study from Iran

Sepideh Abdi  1 , Saeed Nemati  1 , Nader Nederi Darbaghshahi  2 , Mehdi Mohammadi  2 , Elnaz Saeedi  3 , Parnian Naji  1 , Negar Taheri  1 , Ali Qandian  4 , Narges Joshang  4 , Pedram Fattahi  1   5 , Peyman Namdar  6 , Mojtaba Vand Rajabpour  1
Affiliations

Trends of in-hospital and ICU mortality in COVID-19 patients over the fourth and fifth COVID-19 surges in Iran: a retrospective cohort study from Iran

Sepideh Abdi et al. Int J Qual Health Care. .

Abstract

Objective: The current study aimed to investigate the temporal trend of in-hospital and intensive care unit (ICU) mortality of coronavirus disease 2019 (COVID-19) patients over 6 months in the spring and summer of 2021 in Iran.

Design: We performed an observational retrospective cohort study.

Setting: Qazvin Province- Iran during 6 month from April to September 2021.

Participants: All 14355 patients who were hospitalized with confirmed COVID-19 in hospitals of Qazvin Province.

Intervention: No intervention.

Main outcome measures: The trends of overall in-hospital mortality and ICU mortality were the main outcome of interest. We obtained crude and adjusted in-hospital and ICU mortality rates for each month of admission and over surge and lull periods of the disease.

Results: The overall in-hospital mortality, early mortality and ICU mortality were 8.8%, 3.2% and 67.6%, respectively. The trend for overall mortality was almost plateau ranging from 6.5% in July to 10.7% in April. The lowest ICU mortality was 60.0% observed in April, whereas it reached a peak in August (ICU mortality = 75.7%). Admission on surge days of COVID-19 was associated with an increased risk of overall mortality (Odds ratio = 1.3, 95% confidence interval = 1.1, 1.5). The comparison of surge and lull status showed that the odds of ICU mortality in the surge of COVID-19 was 1.7 higher than in the lull period (P-value < 0.001).

Conclusions: We found that the risk of both overall in-hospital and ICU mortality increased over the surge period and fourth and fifth waves of severe acute respiratory syndrome coronavirus 2 infection in Iran. The lack of hospital resources and particularly ICU capacities to respond to the crisis during the surge period is assumed to be the main culprit.

Keywords: health-care system; infectious diseases; intensive care; patient outcomes.

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Figures

Figure 1
Figure 1
Crude mortality rates trends for patients admitted with COVID-19 in Qazvin province, Iran, stratified by month of admission.
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