CFR time trend analysis for Iran, showed that this rate had a negative trend that was not statistically significant at the level of 0.05.
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World one-hundred days after COVID-19 outbreak: Incidence, case fatality rate, and trend.
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Furthermore, the time trend of deaths due to COVID-19 indicated that all countries have had an increasing trend, and an average of more than 1903 deaths have happened in the world each day.
Iran and Ukraine had a decreasing trend in CFR, but the trends were not statistically significant ( P > 0.05).