scholarly journals Trends, patterns, and incidence rate of seasonal influenza among Dubai population and some associated factors, 2017-2-19

2021 ◽  
Vol 7 (1) ◽  
pp. 01-06
Author(s):  
Hamid Hussain
Keyword(s):  
Incidence Rate ◽  
Associated Factors ◽  
Seasonal Influenza ◽  
Age Groups ◽  
Health Care Facilities ◽  
Preschool Age ◽  
Age Group ◽  
Convenience Sample ◽  
Rapid Transmission ◽  
Influenza Case

Background: WHO estimates that seasonal influenza may result in 290 000-650 000 deaths each year due to respiratory diseases alone. In addition, affected more than 10% of total population annually worldwide, Seasonal influenza is highly contagious disease; spreads easily, with rapid transmission in crowded areas including schools and nursing homes. Objectives: To Study incidence rate, trends and patterns of seasonal influenza among Dubai population for the period 2017-2019, to Study some of the associated factors. Materials & Subjects: A retrospective records review study was carried out of convenience sample of 29158 confirmed seasonal influenza case reported in Emirate of Dubai for the period 2017-2019. All age groups, genders, nationalities, occupations, education and seasons were considered. Findings: The study showed that 53.42% of total seasonal influenza cases were among male groups in Dubai, almost 50% % of the cases were among age group less than 15 years old, and almost one quarter of cases were among the age group between 30-40 years old, the present study showed that 54.37% were among Asian groups, 14.59% of the seasonal influenza incidence in Dubai during 2017-2019 were among Emirati population and 18.79% were among Arabs groups .As per occupation, the study showed that 30.74% of total seasonal influenza cases were among students in Dubai, on the other hand the study revealed that 84.53% of the total seasonal influenza cases during 2017-2019 were handled at outpatient level, yet 15.47% were sever enough cases to be admitted and treated at inpatient facilities. Incidence rate per 100000 population were increased respectively from 2017 through out 2019 (168, 297,466). The study revealed as well that the rate as per nationality the seasonal influenza incidence rate in Dubai from 2017=2019 650/100000 among Jordanian living in Dubai,, almost 50% % of the cases were among age group less than 15 years old, and almost one quarter of cases were among the age group between 30-40 years old, the present study showed that 54.37% were among Asian groups, 14.59% of the seasonal influenza incidence in Dubai during 2017-2019 were among Emirati population and 19.71% were among Arabs groups . The study showed that 30.74% of total seasonal influenza were students in Dubai, 84.53% of the total seasonal influenza cases during 2017-2019 were managed at outpatient. yet 15.47% were sever enough cases to be admitted and treated at inpatient level of different health care facilities in Dubai. Incidence among Egyptian was 557/100000, while among Emirates, 325 /100000, Incidence rate of seasonal influenza 2017-2019 according to age distributions showed that 30.7%among students, and 7.8%among children preschool age, and 5.22%among housewives. The present study showed that the incidence rate of seasonal influenza in Dubai in 2017-2019 as per moth distributions was the highest, 21.4%in November followed by 18.2%in December, and the least was 2%in July. Conclusions: incidence rate of seasonal influenza in Dubai keep increasing during the last three years, the highest rates significantly come from children segment of population specially students and elderly group as well, the period from October to end of February of each years.

scholarly journals Hip fractures among the elderly in Kyoto, Japan: a 10-year study

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Maki Asada ◽  
Motoyuki Horii ◽  
Kazuya Ikoma ◽  
Tsuyoshi Goto ◽  
Naoki Okubo ◽  
...  
Keyword(s):  
Hip Fracture ◽  
Femoral Neck ◽  
Incidence Rate ◽  
Acute Care ◽  
Hip Fractures ◽  
Age Groups ◽  
The Elderly ◽  
Femoral Neck Fractures ◽  
Age Group ◽  
Trochanteric Fractures

Abstract Summary In Kyoto Prefecture, Japan, the number of hip fractures increased during 2013–2017 compared to 2008–2012. However, the estimated overall incidence rate increased only in femoral neck fractures in men aged ≥75 and women aged ≥85. Purpose The incidence rate of hip fractures in Japan has plateaued or decreased. We investigated the annual hip fracture occurrences in Kyoto Prefecture, Japan, from 2008 to 2017. Methods Patients aged 65 years and above who sustained hip fractures between 2008 and 2017 and were treated at one of the participating 11 hospitals were included. The total number of beds in these institutions was 3701, accounting for 21.5% of the 17,242 acute-care beds in Kyoto Prefecture. The change in incidence rate was estimated utilizing the population according to the national census conducted in 2010 and 2015. Results The total number of hip fractures was 10,060, with 47.5% femoral neck fractures and 52.5% trochanteric fractures. A decrease in number was seen only in trochanteric fractures in the group of 75- to 84-year-old women. The population-adjusted numbers of femoral neck fractures showed a significant increase in all age groups in men, whereas in women, there was an increase in femoral neck fractures in the ≥85 group and trochanteric fractures in the age group 65–74, and a decrease in trochanteric fractures in the age group 75–84. The estimated change in incidence rate showed an increase in femoral neck fractures in men aged ≥75 and women aged ≥85. Conclusion In Kyoto Prefecture, the number of hip fractures increased in the second half of the study period (2013–2017) compared to the first half (2008–2012). However, the incidence rate had not increased, except in femoral neck fractures in men aged ≥75 and women aged ≥85.

scholarly journals Prevalence of Oral Mucosal Lesions in a Group of Iranian Dependent Elderly Complete Denture Wearers

2013 ◽  
Vol 14 (2) ◽  
pp. 174-178 ◽  
Author(s):  
Parsa Atashrazm ◽  
Donia Sadri
Keyword(s):  
Nursing Home ◽  
Significant Relationship ◽  
Associated Factors ◽  
Age Groups ◽  
Complete Denture ◽  
Age Group ◽  
Denture Stomatitis ◽  
Oral Mucosal Lesions ◽  
Mucosal Lesions ◽  
Dependent Elderly

ABSTRACT Aim Oral mucosal lesions are frequently observed in institutionalized elderly patients more than other age groups. The aim of this study was to determine the prevalence of epulis fissuratum and denture stomatitis and their associated causes in dependent elderly complete denture wearers. Materials and methods This study was conducted in dependent elderly complete denture's wearers living in four randomly selected nursing homes located in Tehran. Associated factors such as gender, age, use of medication, site of nursing home, denture quality and denture-wearing habit were studied. Results Overall, 674 patients were examined; 201 had complete denture. The prevalence of denture stomatitis was 36%. There was significant relationship among the prevalence of denture stomatitis with gender and denture wearing period (p < 0.05). The prevalence of epulis fissuratum was 16.4%. There was significant relationship among the prevalence of epulis fissuratum with gender, denture quality and denture wearing habit (p < 0.05). Conclusion In this particular dependent age group, the prevalence of oral mucosal lesions is high and the mentioned associated factors should be noticed. Clinical significance Dependent elderly complete denture wearers need more support and motivation for reducing the prevalence of these particular denture-associated oral mucosal lesions. How to cite this article Atashrazm P, Sadri D. Prevalence of Oral Mucosal Lesions in a Group of Iranian Dependent Elderly Complete Denture Wearers. J Contemp Dent Pract 2013;14(2):174-178.

scholarly journals Vaccine impact and effectiveness of meningococcal serogroup ACWY conjugate vaccine implementation in the Netherlands: a nationwide surveillance study

2021 ◽  
Author(s):  
Milou Ohm ◽  
Susan J M Hahné ◽  
Arie van der Ende ◽  
Elizabeth A M Sanders ◽  
Guy A M Berbers ◽  
...  
Keyword(s):  
The Netherlands ◽  
Incidence Rate ◽  
Vaccination Programme ◽  
Screening Method ◽  
Age Groups ◽  
Incidence Rates ◽  
Age Group ◽  
Mass Campaign ◽  
Conjugate Vaccination ◽  
The Impact

Abstract Background In response to the recent serogroup W invasive meningococcal disease (IMD-W) epidemic in the Netherlands, meningococcal serogroup C (MenC) conjugate vaccination for 14-month-olds was replaced with a MenACWY conjugate vaccination, and a mass campaign targeting 14-18 year-olds was executed. We investigated the impact of MenACWY vaccination implementation in 2018-2020 on incidence rates and estimated vaccine effectiveness (VE). Methods We extracted all IMD cases diagnosed between July 2014 and December 2020 from the national surveillance system. We calculated age group-specific incidence rate ratios by comparing incidence rates before (July 2017-March 2018) and after (July 2019-March 2020) MenACWY vaccination implementation. We estimated VE in vaccine-eligible cases using the screening method. Results Overall, IMD-W incidence rate lowered by 61% (95%CI 40-74). It declined by 82% (95%CI 18-96) in vaccine-eligible age group (15-36 month-olds and 14-18 year-olds) and by 57% (95%CI 34-72) in vaccine non-eligible age groups. VE was 92% (95%CI -20-99.5) against IMD-W vaccine-eligible toddlers. No IMD-W cases were reported in vaccine-eligible teenagers after the campaign. Conclusions The MenACWY vaccination programme was effective in preventing IMD-W in the target population. The IMD-W incidence reduction in vaccine non-eligible age groups may be caused by indirect effects of the vaccination programme. However, disentangling natural fluctuation from vaccine-effect was not possible. Our findings encourage the use of toddler- and teenager MenACWY vaccination in national immunization programmes especially when implemented together with a teenager mass campaign during an epidemic.

Higher Incidence of Chronic Myeloid Leukemia (CML) Among Blacks Compared to Whites in the Post-Imatinib Period (2002–2009) Corresponds with Worse Survival Observed within the Surveillance, Epidemiology and End Results 18 Registries

Blood ◽  
2012 ◽  
Vol 120 (21) ◽  
pp. 3773-3773
Author(s):  
Adam Mendizabal ◽  
Paul H Levine
Keyword(s):  
Tyrosine Kinase ◽  
Incidence Rate ◽  
Kinase Inhibitors ◽  
Age Groups ◽  
Incidence Rates ◽  
Age At Diagnosis ◽  
Age Group ◽  
Risk Of Death ◽  
Younger Age ◽  
Adjusted Incidence

Abstract Abstract 3773 Background: Age at diagnosis of CML varies by race in the United States with median occurring around ages 54 and 63 among Black and White patients, respectively. The treatment paradigm shifted when Imatinib was approved in 2001 for treatment of CML. More recently, second generation tyrosine kinase inhibitors (TKI) have also been used for treatment of CML. Differences in outcomes by race have been previously reported prior to the TKI treatment period. We aimed to assess whether the earlier age at diagnosis resulted in differential trends in age-adjusted incidence rates and survival outcomes by race in the post-Imatinib treatment period. Methods: Data from the Surveillance, Epidemiology, and End Results (SEER) 18 Registries were extracted for diagnoses between 2002 and 2009 based on the assumption that cases diagnosed after 2002 would be treated with TKI's. CML was defined according to the International Classification of Diseases for Oncology 3rd edition code 9863 (CML-NOS) and 9875 (CML-Philadelphia Chromosome Positive). Cases diagnosed by autopsy or death certificate only were excluded. Incidence rates are expressed per 100,000 person-years and age-adjusted to the 2000 US Standard Population. Black/White incidence rate ratios (IRRBW) are shown with corresponding 95% confidence intervals (CI). Kaplan-Meier estimates of CML-specific survival (CPS) and overall survival (OS) were estimated at 5-years post-diagnosis with the event being time to CML-specific death or any death, respectively. Stratified Cox proportional hazards models were constructed to assess the impact of age and race on the risk of death expressed as a hazard ratio (HR). Results: Since 2002, 6,632 patients diagnosed with CML were reported to the SEER 18 registries including 5,829 White patients (87.9%) and 803 Black patients (12.1%) with 57% being male. The age-adjusted incidence rate for Blacks was 1.18 (95% CI, 1.10–1.27) per 100,000 and 1.12 (95% CI, 1.09–1.27) per 100,000 for Whites. The corresponding IRRBW was 1.06 (95% CI, 0.98– 1.14). When considering 20-year age-groups, Blacks had higher incidence rates in the 20–39 and 40–59 age groups; IRRBW of 1.26 (95% CI, 1.06–1.49; p=0.0073) and 1.23 (95% CI, 1.09–1.39; p=0.0007), respectively. No statistically significant differences in IRRBW were seen within the 0–19, 60–79 and 80+ age-groupings although Whites have higher non-significant incidence rates in the latter 2 age-groups. Differences in IRRBW prompted an assessment of survival to determine if the excess incidence observed in the younger age groups corresponded with a worse survival. CPS at 5-years was 85.5% (95% CI, 84.3–86.6). In univariate analysis, age was an important predictor of outcome (p<0.0001) with patients diagnosed after age 80 having the worse outcomes (OS: 58.3%), followed by patients diagnosed between 60 and 79 years (OS 84.7%), 0–19 years (OS: 87.1%), 40–59 years (OS: 90.2%), and 20–39 years (OS: 92.6%). When considering all age-groups, race was not a significant predictor of death (HR 0.91; 95% CI, 0.72–1.15). However, in a stratified analysis with 20-year age groups, Blacks had an increased risk of death as compared to Whites (Figure 1) in the 20–39 age group (HR: 2.94; 95% CI, 1.72–5.26; p<0.0001) and the 40–59 age group (HR: 1.67; 95% CI, 1.22–2.27; p=0.0069) while no differences were seen within the 0–19, 60–79 and 80+ age groups. Conclusions from OS models were similar to that of the CPS models. Conclusions: Through this analysis of population-based cancer registry data collected in the US between 2002 and 2009, we show that Blacks have a younger age at diagnosis with higher incidence rates observed in the 20–39 and 40–59 age-groups as compared to Whites. Both CPS and OS outcomes differed by race and age. Similar to the differences observed with the incidence rates, survival was worse in Blacks diagnosed within the 20–39 and 40–59 age-groups as compared to Whites. Although outcomes have globally improved in patients with CML since the advent of tyrosine kinase inhibitors, the persistence of incidence heterogeneity and poorer survival among Blacks warrants further attention. Access to care may be a possible reason for the differences observed but further studies are warranted to rule out biological differences which may be causing an earlier age at onset and poorer survival. Disclosures: No relevant conflicts of interest to declare.

Breast cancer incidence in a large cohort of Peruvian women affiliated to a pre-paid system.

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e12570-e12570
Author(s):  
Juan F. Suazo ◽  
Priscila I. Valdiviezo ◽  
Claudio J. Flores ◽  
Jorge Iberico ◽  
Joseph A. Pinto ◽  
...  
Keyword(s):  
Breast Cancer ◽  
At Risk ◽  
General Population ◽  
Incidence Rate ◽  
Breast Cancer Incidence ◽  
Age Groups ◽  
Cumulative Risk ◽  
Incidence Rates ◽  
Specific Rate ◽  
Age Group

e12570 Background: Breast cancer (BC) is the second most common malignancy and the leading cause of death by cancer in Peruvian women (age-standarized rate [ASR] of 34 new cases/100,000 women estimated by GLOBOCAN 2008). The purpose of this study was to assess the incidence of BCin acohort ofwomenat Oncosalud, an oncologic pre-paid system that currently has 600,000 affiliates. Methods: We evaluated a dynamic cohort (period 1989 to 2011) of women affiliatedat Oncosalud – AUNA, an oncologic prepaid system.The crude incidence rate per year (number of new cases/women at risk), the specific rate according to age (number of new cases / persons-year) and cumulative risk were calculated. Results: Overall, during the assessment period, the BC incidence rate per year was 175.6 and the ASR incidence was 111.9 per 100,000 affiliates respectively. In our cohort of affiliates there were no BC cases before 1993 (with 907 women at risk for that year). The highest incidence rate was 177.6 registered in 1997 (11,822 women at risk). Incidence rates started decreasing in 2003 (169.2 with a population at risk of 39,593 women). The lowest incidence was 71.5, registered in 2011 (279,680 women at risk).According to age-groups, there were no BC cases under20 years old. Specificincidence ratesper age-group increases from the 30 year old-group (55.8). The peak of BC incidence was between 70 to 74 years old (407.4). In the same way, the cumulative risk increases after 30 years old. Conclusions: In our cohort of affiliates, the incidence of BC is greater than the general population, it could be due to the process of negative selection; however, specific incidence rates per age-group and cumulative risk are increased after 30 years, as seen in the general population.

scholarly journals High Incidence of Severe Influenza among Individuals over 50 Years of Age

2011 ◽  
Vol 18 (11) ◽  
pp. 1918-1924 ◽  
Author(s):  
Anna J. X. Zhang ◽  
Kelvin K. W. To ◽  
Herman Tse ◽  
Kwok-Hung Chan ◽  
Kun-Yuan Guo ◽  
...  
Keyword(s):  
Influenza Vaccination ◽  
Incidence Rate ◽  
Old Age ◽  
H1n1 Virus ◽  
Severe Disease ◽  
Age Groups ◽  
Respiratory Viruses ◽  
World Health ◽  
Pandemic H1n1 ◽  
Age Group

ABSTRACTAge-specific epidemiological data on asymptomatic, symptomatic, and severe infections are essential for public health policies on combating influenza. In this study, we incorporated data on microbiologically confirmed infections and seroprevalence to comprehensively describe the epidemiology of pandemic H1N1 2009 influenza. Seroprevalence was determined from 1,795 random serum samples collected in our hospital in January 2007 (before the first wave of the pandemic) and March 2010 (after the second wave). Data on microbiologically confirmed infection and severe cases were obtained from the Centre for Health Protection in Hong Kong. Severe cases were most common in the 51- to 60-year-old age group. The microbiologically confirmed incidence rate was highest for children aged ≤10 years and dropped sharply for the adult population (ρ = −1.0;P< 0.01), but the incidence rate for severe disease was highest for the 51- to 60-year-old age group. For the 51- to 60-year-old age group, the seroprevalence was similar to that for the younger age groups, but the proportion of severe cases relative to seroprevalence was significantly higher than that for 11- to 50-year-old age groups. As judged from the percentage of specimens positive for other respiratory viruses compared with that for pandemic H1N1 virus, the impact of symptomatic disease due to pandemic H1N1 virus was higher than that for other respiratory viruses in people aged ≤50 years. In conclusion, the 51- to 60-year-old age group, which had the highest overall incidence and the highest rate of severe disease but is currently not considered by the World Health Organization to be an at-risk group, should be prioritized for influenza vaccination in areas where universal influenza vaccination is not practiced.

scholarly journals Profile of Suspected Cholera Patients during May – November 2017 in Sanaa City Secondary Analysis

2020 ◽  
pp. 40-48
Author(s):  
Mohammed Qassime ◽  
Ryad Al- Nemri ◽  
Mutahar Al- Qassimi
Keyword(s):  
Age Groups ◽  
Secondary Analysis ◽  
Case Fatality ◽  
Health Care Facilities ◽  
Epidemiological Surveillance ◽  
Age Group ◽  
Under Five ◽  
Management Interventions ◽  
Care Facilities ◽  
Control And Management

Introduction: From 27 April to 3 August 2017, 453,175 suspected cholera cases and 1,930 deaths (CFR: 0.4%) have been reported in 95.6% (22/23) of Yemen governorates, and 89.2% (297/333) of the districts. The five most affected governorates were Amanat Al-Asima, Al Hudaydah, Hajjah, Amran and Dhamar with 53% (239,877/453,175) of the cases reported since 27 April 2017. In amanat al Asimah (Sana'a city) 55563 cases 61 deaths are registered in that period with case fatality rate 0.1% and attack rate 1.68% Objectives: To study Profile of suspected cholera patients in Sanaa city. Materials and Methods: A retrospective descriptive study was carried out by using secondary analysis of available data collected from (DTCs), (ORCs) and other health facilities by department of epidemiological surveillance – Sanaa city health office. Results: A total of 92995 suspected cholera patients were included in the study whereas the average age of study subjects was 22.7 years where standard deviation (SD) 18.8 most affected age groups were (15-29),(5-14),(<5) the predominant of the study subjects from Sanaa city (96%) from Ma'ain, Bani-Alhareth, AND Al-Sabain districts Most cases are reported from DTCs (59300), ORCs (29547) Cases starts to appear in week 17 reaches a peak in weeks 24,25  and then slowly decreases. 155 suspected cholera cases were culture positives Conclusion: 1. Cholera is one of the urgent health problems in Sana’a city Cholera distribution is not gender sensitive, the most affected age group is (15-29) years, followed by (5-14) then under five Cases are mainly distributed in Ma'ain, Bani-Alhareth, & Al-Sabain within Sana’a city (50% of the total cases). The main cholera health care facilities are mainly DTCs and ORCs supported by WHO & UNICEF Most of the subjects seek medical care within the first 2 days after onset of symptoms The peak of cholera suspected cases is registered in weeks 24 & 24. Confirmed cholera cases by culture are 155 from 655 specimen tested whereas 1984 are positive by cholera RDT Recommendations:1. More cholera control interventions are necessary and urgent to eradicate it. More field related research must be carried out to guide control and management interventions. Some interventions must be concentrated on the age groups 5-14 & under five and at the most affected areas.

scholarly journals Study to Assess Age Predilection of Malnutrition in Preschool Children

2019 ◽  
pp. 5-10
Author(s):  
Anil Gupta
Keyword(s):  
Preschool Children ◽  
Random Sampling ◽  
Sampling Method ◽  
Age Groups ◽  
Formative Period ◽  
Preschool Age ◽  
Age Group ◽  
Study Population ◽  
Nutritional Status Of Children ◽  
The City

Background : Age of children is the important demographic factor that is involved in nutritional status of children. The preschool age of children is the formative period in which growth and development of children occur. The deficiency of calories and minerals in the preschool age could result in to malnutrition in children. Participants and Methods : Present study was comprised of total 440 children which were selected through two stage random sampling method. The children between 2 years to below 5 years were the sampling units. The study was conducted at the city Fazilka in Punjab in Indi Results and Discussion : The study population was comprised of total 440 preschool which were categorized into three age groups as 2y to 3y with children (n/N=169/440) representing 38.4% in schools, other age group between above 3y to 4y with children (n/N=146/440) representing 33% in anganwadis and the age group above 4y to below 5 years with children (n/N=125/440) representing 28.4%. The stunting in children in 2-3 years age group showed 2.47 times higher chances than the stunting probability in children above 3 to below 5 years age. The Odd ratio between age groups and pallor in preschool children was (OR=0.1986/0.4728) = (0.42) at 95%C. I. of (0.260 to 0.628). Conclusion : Age of children is significantly associated with stunting, pallor and dental caries in children.

scholarly journals Change in the epidemiological profile of severe acute respiratory syndrome in the Brazilian pediatric population: indication of COVID-19 subnotification

2020 ◽  
Vol 10 (3) ◽  
Author(s):  
Renata Pinto ◽  
Isadora Borges ◽  
Jonas Amorim
Keyword(s):  
Severe Acute Respiratory Syndrome ◽  
Incidence Rate ◽  
Pediatric Population ◽  
Age Groups ◽  
Fold Increase ◽  
The Other ◽  
Unknown Etiology ◽  
Age Group ◽  
Epidemiological Profile ◽  
The Impact

INTRODUCTION: The impact of COVID-19 on the Brazilian pediatric population may be underestimated by underreporting. This study compares the incidence of hospitalizations and deaths due to severe acute respiratory syndrome (SARS) and etiologies in children between 2019 and 2020. METHODS: Epidemiological study carried out by consulting InfoGripe. Data referring to epidemiological weeks 1 to 25 of the years 2019 and 2020 were consulted, analyzed using the SPSS 26.0 program. RESULTS: Comparing the years 2019 and 2020, we observed reduction in the incidence rate (per 100,000) of hospitalizations for SARS in the 0-4 year age group from 4.023 to 2.980 (p = 0.05), and an increase in the other age groups, in schoolchildren, 0.353 to 0.618 (p = 0.009) and among adolescents, 0.115 to 0.393 (p = 0.002). There was an increase in deaths from 0.013 to 0.017 (p = 0.05) between 5-9 years, and from 0.009 to 0.029 (p = 0.001) between 10-19 years. In relation to “unknown etiology”, the incidence of hospitalizations increased from 0.294 to 1.454 (p = 0.007) and deaths from 0.03 to 0.28 (p = 0.004). CONCLUSION: The incidence of hospitalizations and deaths due to SARS in 2020 in children aged 5-9 and 10-19 years was higher than in 2019. The 3.4-fold increase in the number of cases, and 9.3-fold increase in deaths from SARS without a defined etiology in 2020 may suggests an important underreporting by COVID -19 in Brazil. Further studies are needed to assess the extent and impact of SARS-CoV-2 in children.

scholarly journals The average peak time and intensity of seasonal influenza may vary by age: a study of laboratory confirmed influenza

2020 ◽  
Vol 21 (5) ◽  
pp. 170-176
Author(s):  
Bhikhari P Tharu
Keyword(s):  
Seasonal Influenza ◽  
Human Life ◽  
Parametric Method ◽  
Age Groups ◽  
Respiratory Illness ◽  
Peak Time ◽  
Age Group ◽  
Calendar Time ◽  
Control And Prevention ◽  
The Usa

Background: Seasonal influenza (SI) is an acute respiratory illness that exerts a severe impact on human life year-round. Yet, very few studies have been conducted to investigate its peak timing for different age groups. Objective: To evaluate the average peak calendar time and intensity for the incidence of SI for different age groups. Methods: The study uses laboratory-confirmed Influenza data from the Centers for Disease Control and Prevention (CDC) of the USA with age groups 2, 11, 34, 57 and 65 years during 2009–2018 for the analysis. A non-parametric method of estimation of a circular probability distribution called likelihood cross-validation method has been utilised. Results: The average peak date of incidence for age groups 2 and 11 is around the last week of December. However, the date shifts to the last week of January to the first week of February for other groups. Age groups 65 and 2 years experienced the most severe impact among all. Discussion: The average peak time for SI incidence is between the last week of December to January with a single peak time for every age group. However, the incidence seems to develop an additional moderate peak time for age group 65.

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