Monthly variation in acute appendicitis incidence: A 10-year nationwide population-based study

Wei, Po Li; Chen, Chin Shyan; Keller, Joseph J.; Lin, Herng Ching

doi:10.1016/j.jss.2012.06.034

Cited by 59 publications

(58 citation statements)

References 25 publications

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“…This pattern has been observed in previous studies as well [6,10,19,33,45]. Wei et al [19] analyzed the relationship between the incidence of appendicitis and climate factors, including ambient temperature, relative humidity, atmospheric pressure, rainfall, and hours of sunshine, and they found that only the ambient temperature was positively correlated with the incidence of appendicitis. Kaplan et al [46] reported a significant effect of air pollution on the incidence of appendicitis in the summer months.…”

Section: Discussionsupporting

confidence: 72%

“…Certain studies have also been conducted in Taiwan regarding the epidemiological features of appendicitis [18-25]. These studies concerned chiefly the monthly incidence variations of acute appendicitis [19], the volume-outcome relation of acute appendicitis [20], trend differentials in incidence rates for ruptured appendicitis between rural and urban populations [21], and a comparison of the perforation rate of acute appendicitis between nationals and immigrants [22]. However, epidemiological data on appendicitis specifically for the LIP have yet to be reported in Taiwan.…”

Section: Introductionmentioning

confidence: 99%

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Epidemiology of appendicitis and appendectomy for the low-income population in Taiwan, 2003–2011

et al. 2015

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BackgroundAlthough numerous epidemiological studies on appendicitis have been conducted worldwide, only a few studies have paid attention to the effect of socioeconomic status on appendicitis, particularly studies focusing on the low-income population (LIP).MethodsWe analyzed the epidemiological features of appendicitis in Taiwan using data from the National Health Insurance Research Database from 2003 to 2011. All cases diagnosed as appendicitis were enrolled.ResultsBetween 2003 and 2011, 2,916 patients from the LIP and 209,206 patients from the normal population (NP) were diagnosed with appendicitis. Our finding revealed that the ratios of comorbidities, complicated appendicitis, and readmissions in LIP patients were slightly higher than those of NP patients. LIP patients were more likely to live in suburban and rural areas, and hence a higher proportion of them were hospitalized in a district or regional hospital compared with NP patients. The crucially finding was that the overall incidence ratios of appendicitis, acute appendicitis, and perforated appendicitis in the LIP were substantially higher than those in the NP (36.25%, 35.33%, and 37.28%, respectively). The mean LOS in LIP patients was longer than that of NP patients. The overall case-fatality ratio of appendectomy in the LIP was higher when compared with the NP (0.41% versus 0.12%, p < 0.05). We also observed that appendicitis was occurred frequently in male patients, with a higher incidence for those aged 15–29 years in both the LIP and NP. The incidences of incidental appendectomy showed a decreasing trend in both the LIP and NP. Finally, a valuable discovery was that the total hospital cost was comparable between the laparoscopic appendectomy (LA) and open appendectomy (OA) (1,178 ± 13 USD versus 1,191 ± 19 USD, p < 0.05) in LIP patients because they saved more hospitalization costs than NP patients when the previous one chose the LA.ConclusionThis study confirmed that a lower socioeconomic status has significantly negative impact on the occurrence and treatment of appendicitis and appendectomy. In terms of hospital costs and LOS, LIP patients benefit more from the LA approach than they do from the OA approach in the treatment of appendicitis.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Epidemiology of appendicitis and appendectomy for the low-income population in Taiwan, 2003–2011

et al. 2015

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“…Denominator data at a country level cannot easily be collected using this methodology. The “snapshot” may not accurately reflect overall practice, particularly where there are prominent seasonal effects [29]. We were not able to capture the degree of sepsis beyond the ASA and perforation rates, which may result in residual confounding.…”

Section: Discussionmentioning

confidence: 99%

Laparoscopy in management of appendicitis in high-, middle-, and low-income countries: a multicenter, prospective, cohort study

Collaborative

2018

Surg Endosc

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BackgroundAppendicitis is the most common abdominal surgical emergency worldwide. Differences between high- and low-income settings in the availability of laparoscopic appendectomy, alternative management choices, and outcomes are poorly described. The aim was to identify variation in surgical management and outcomes of appendicitis within low-, middle-, and high-Human Development Index (HDI) countries worldwide.MethodsThis is a multicenter, international prospective cohort study. Consecutive sampling of patients undergoing emergency appendectomy over 6 months was conducted. Follow-up lasted 30 days.Results4546 patients from 52 countries underwent appendectomy (2499 high-, 1540 middle-, and 507 low-HDI groups). Surgical site infection (SSI) rates were higher in low-HDI (OR 2.57, 95% CI 1.33–4.99, p = 0.005) but not middle-HDI countries (OR 1.38, 95% CI 0.76–2.52, p = 0.291), compared with high-HDI countries after adjustment. A laparoscopic approach was common in high-HDI countries (1693/2499, 67.7%), but infrequent in low-HDI (41/507, 8.1%) and middle-HDI (132/1540, 8.6%) groups. After accounting for case-mix, laparoscopy was still associated with fewer overall complications (OR 0.55, 95% CI 0.42–0.71, p < 0.001) and SSIs (OR 0.22, 95% CI 0.14–0.33, p < 0.001). In propensity-score matched groups within low-/middle-HDI countries, laparoscopy was still associated with fewer overall complications (OR 0.23 95% CI 0.11–0.44) and SSI (OR 0.21 95% CI 0.09–0.45).ConclusionA laparoscopic approach is associated with better outcomes and availability appears to differ by country HDI. Despite the profound clinical, operational, and financial barriers to its widespread introduction, laparoscopy could significantly improve outcomes for patients in low-resource environments.Trial registration: NCT02179112.Electronic supplementary materialThe online version of this article (10.1007/s00464-018-6064-9) contains supplementary material, which is available to authorized users.

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“…En nuestro caso, no encontramos una relación con la humedad ambiental, lo que coincide con estudios anteriores (3) . Se menciona una relación débil entre la humedad ambiental y la incidencia de apendicitis, pero no ex- plicaría la variación estacional de la incidencia de la apendicitis (9)(10)(11)(12)(13) .…”

Section: Discussionunclassified

“…Se han considerado factores como humedad, tiempo de luz solar, presión atmosférica, lluvia y temperatura. Siendo esta última un posible factor clave en la variación estacional de la incidencia de esta enfermedad (3) .…”

Section: Introductionunclassified

Incidencia de apendicitis aguda y su relación con factores ambientales, Perú, 2013

Tejada-Llacsa

Melgarejo-García

2015

An Fac med

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Incidencia de apendicitis aguda y su relación con factores ambientales, Perú, 2013Incidence of acute appendicitis and its relationship to environmental factors, Peru, 2013 Paul J. Tejada-Llacsa 1,2 , Giannina C. Melgarejo-García ResumenIntroducción. La apendicitis aguda es la causa más frecuente de abdomen agudo quirúrgico. A pesar de su frecuencia, poco se conoce sobre su epidemiologia en el Perú. Objetivos. Explorar la incidencia de la apendicitis aguda y su relación con la temperatura ambiental. Diseño. Estudio ecológico de grupos múltiples. Institución. Facultad de Medicina de San Fernando, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material. Registros del Ministerio de Salud y del Instituto Nacional de Estadística e Informática, Lima, Perú. Métodos. Se realizó un estudio ecológico de grupos múltiples a partir de los registros de apendicitis. Se analizó los resultados con el coeficiente correlación de Pearson y para medir la asociación se usó la regresión de Poisson. Principales medidas de resultados. Incidencia de apendicitis y temperatura media anual por departamento y razón de incidencias (IRR). Resultados. Se encontró una correlación positiva entre la temperatura y la tasa de incidencia de apendicitis (r= 0,46, p=0,02). En el análisis de regresión se obtuvo una asociación significativa (p= 0,01) entre la tasa de incidencia de apendicitis y la temperatura ambiental (IRR=1,04, IC: 1,01-1,08). Conclusiones. Existió asociación directa entre la incidencia de apendicitis y la temperatura ambiental. Palabras clave. Apendicitis; Temperatura ambiental; Humedad ambiental. Abstract Background: Acute appendicitis is the most common cause of acute surgical abdomen. Despite its frequency, little is known on its epidemiology in Peru. Objectives: To determine the relation between incidence of appendicitis and environmental temperature. Design: Multiple group study. Setting: San Fernando Faculty of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru. Material: Records from the Ministry of Health and data from the National Institute of Statistics and Informatics, Lima, Peru. Methods: An ecological study of multiple groups was performed from appendicitis records. Results were analyzed with Pearson coefficient and Poisson regression. Main outcome measures: Incidence of appendicitis and annual average temperature by department and incidence rate ratios (IRR). Results: A positive correlation between temperature and rate of incidence of appendicitis (r = 0.46; p = 0.02) was obtained. In the regression analysis a significant association (p = 0, 01) between incidence rate of appendicitis and environmental temperature (IRR = 1.04, CI: 1.01-1.08) was found. Conclusion: There was direct association between incidence of appendicitis and enviromental temperature.

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Monthly variation in acute appendicitis incidence: A 10-year nationwide population-based study

Cited by 59 publications

References 25 publications

Epidemiology of appendicitis and appendectomy for the low-income population in Taiwan, 2003–2011

Epidemiology of appendicitis and appendectomy for the low-income population in Taiwan, 2003–2011

Laparoscopy in management of appendicitis in high-, middle-, and low-income countries: a multicenter, prospective, cohort study

Incidencia de apendicitis aguda y su relación con factores ambientales, Perú, 2013

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