Serial Interval Distribution of COVID-19 among Iranian Reported Confirmed Cases

Type of manuscript: short report Introduction:  Serial interval refers to the average time between of the onset of the symptoms of two successive cases. Serial interval distribution can be used for the calculation of the basic reproduction number (R0), transmission rate, and study of an epidemic trend. This study aims to investigate the mean, standard deviation, and distribution of serial interval among the confirmed cases of COVID-19 using a Gamma distribution.      Methods: To determine the serial interval, 60 confirmed infected cases of COVID-19 (based on PCR test results) in February 20th-May 20th, 2020 were selected as the cases. For these cases, 37 transmissions occurred. The data of the dates of the occurrence of primary and secondary symptoms were collected by referring to the COVID-19 surveillance system and interviewing the patients Results: The findings showed that the median and mean of the serial interval were 3.0 and 4.5± 3.5 days. The findings showed that the median of the serial interval was 3.0 days (with the inter-quartile range of 2.0-6.0). The mean serial interval was 4.5± 3.5 days (95% confidence interval: 3.1-5.5). Conclusions: Our report showed a shorter period for a serial interval less than the previous reported interval in China. It seems that regarding the shorter serial interval reported in this study, the basic reproduction numbers reported by the first papers published in Iran have been overestimated regarding the serial interval of 7.5 days. Key words: COVID-19, Serial interval, Gamma distributio

Serial Interval Distribution of COVID-19 among Iranian Reported Confirmed Cases

Type of manuscript: short report Introduction:  Serial interval refers to the average time between of the onset of the symptoms of two successive cases. Serial interval distribution can be used for the calculation of the basic reproduction number (R0), transmission rate, and study of an epidemic trend. This study aims to investigate the mean, standard deviation, and distribution of serial interval among the confirmed cases of COVID-19 using a Gamma distribution.      Methods: To determine the serial interval, 60 confirmed infected cases of COVID-19 (based on PCR test results) in February 20th-May 20th, 2020 were selected as the cases. For these cases, 37 transmissions occurred. The data of the dates of the occurrence of primary and secondary symptoms were collected by referring to the COVID-19 surveillance system and interviewing the patients Results: The findings showed that the median and mean of the serial interval were 3.0 and 4.5± 3.5 days. The findings showed that the median of the serial interval was 3.0 days (with the inter-quartile range of 2.0-6.0). The mean serial interval was 4.5± 3.5 days (95% confidence interval: 3.1-5.5). Conclusions: Our report showed a shorter period for a serial interval less than the previous reported interval in China. It seems that regarding the shorter serial interval reported in this study, the basic reproduction numbers reported by the first papers published in Iran have been overestimated regarding the serial interval of 7.5 days. Key words: COVID-19, Serial interval, Gamma distributio

Moderate to low knowledge and Positive Attitude towards Medicinal Plants leads to High Consumption of these Plants during Pregnancy

Background: In recent years, the use of medicinal plants in developing countries has increased significantly. However, these plants can cause adverse effects on the mother and fetus. This study aimed to investigate the frequency of use, knowledge, and attitude towards the use of medicinal plants in pregnant women. Methods: This descriptive–analytical study was performed in 2020 on 290 pregnant women referring to Shahroud health center. The first part of the questionnaire included demographic information and the second part included information related to knowledge, attitude, behavior, reasons for using medicinal plants, source of information, etc. The significant level was set at 0.05. Results: 61% of the participants had used the medicinal plants at least once during pregnancy. Most pregnant women had moderate knowledge (50%) and a positive attitude (73.1%) towards the use of medicinal plants. Behavior was significantly associated with knowledge (Pvalue=0.011) and attitude (Pvalue=0.014). The most common problem during pregnancy that caused the use of medicinal plants was heartburn (43.4%) and the main reason for the use of these plants was the availability of them at home or taking from acquaintances (36.6%). 57.2% had obtained their information about medicinal plants from the family. Conclusions: Due to the relatively high frequency of the use of medicinal plants during pregnancy and low knowledge about it, informing and increasing knowledge about medicinal plants during pregnancy is very important. Keywords: Pregnancy, Pregnant women, Medicinal plants, knowledg

Moderate to low knowledge and Positive Attitude towards Medicinal Plants leads to High Consumption of these Plants during Pregnancy

Background: In recent years, the use of medicinal plants in developing countries has increased significantly. However, these plants can cause adverse effects on the mother and fetus. This study aimed to investigate the frequency of use, knowledge, and attitude towards the use of medicinal plants in pregnant women. Methods: This descriptive–analytical study was performed in 2020 on 290 pregnant women referring to Shahroud health center. The first part of the questionnaire included demographic information and the second part included information related to knowledge, attitude, behavior, reasons for using medicinal plants, source of information, etc. The significant level was set at 0.05. Results: 61% of the participants had used the medicinal plants at least once during pregnancy. Most pregnant women had moderate knowledge (50%) and a positive attitude (73.1%) towards the use of medicinal plants. Behavior was significantly associated with knowledge (Pvalue=0.011) and attitude (Pvalue=0.014). The most common problem during pregnancy that caused the use of medicinal plants was heartburn (43.4%) and the main reason for the use of these plants was the availability of them at home or taking from acquaintances (36.6%). 57.2% had obtained their information about medicinal plants from the family. Conclusions: Due to the relatively high frequency of the use of medicinal plants during pregnancy and low knowledge about it, informing and increasing knowledge about medicinal plants during pregnancy is very important. Keywords: Pregnancy, Pregnant women, Medicinal plants, knowledg