Observations on the seasonal variation of the most common acute pediatric diseases in the Helsinki area (Finland)

Peltola, Heikki

doi:10.1007/bf01325512

Cited by 10 publications

(4 citation statements)

References 27 publications

(1 reference statement)

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“…Two peaks in early February and early August, and two nadirs in May and November were in the simple harmonic regression model for boys and a cyclic pattern of a simple harmonic curve was found for girls with a maximum incidence rate in November. These findings could confirm the impression that males are more susceptible than females to some infectious diseases [19][20][21][22]. Gender differences in disease incidence may provide important clues to the pathogenesis of diseases and further research on this subject should be encouraged.…”

Section: Strengths and Weaknessessupporting

confidence: 71%

Seasonal Variation of Childhood Acute Lymphoblastic Leukaemia is Different Between Girls and Boys

Nyári

Kajtár

Bartyik

et al. 2008

Pathol. Oncol. Res.

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The aim of this study was to investigate seasonal trends in the incidence of acute lymphoblastic leukaemia (ALL) around the times of birth and diagnosis in children aged 0-4 years and also to examine gender specific effects. Children born in South Hungary during 1981-1997 were analysed. Registrations of first malignancies for children, diagnosed under age 5 years before the end of 2002 were obtained from the Hungarian Paediatric Oncology Group providing a representative sample of Hungarian children over a 17 year period of time. Data were available on the corresponding numbers of births for each month of the study period were obtained. Statistical analyses were performed using logistic regression with harmonic components. The study analysed 121 cases of children, aged under 5 years, who were diagnosed with ALL. We found no seasonal effect related to date of diagnosis. However, there was seasonal variability for ALL related to date of birth. Maximal rates were seen in children born in February and August in the simple harmonic regression model for all children diagnosed with ALL. Analysis by gender found evidence of seasonality related to month of birth with peaks in February and August in boys, but different seasonal effects were seen for girls (peak in November, nadir in May). Our study provides some evidence that male specific immune responses to infections around the time of birth could explain the male predominance in the incidence of ALL.

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Section: Strengths and Weaknessessupporting

confidence: 71%

Seasonal Variation of Childhood Acute Lymphoblastic Leukaemia is Different Between Girls and Boys

Nyári

Kajtár

Bartyik

et al. 2008

Pathol. Oncol. Res.

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“…Since 1995, the data in the register have been compared with those in hospital discharge registers every few years. Currently, 98% of implantations are recorded in the Finnish Arthroplasty Register (Peltola 2009). …”

Section: Methodsmentioning

confidence: 99%

Results of 3,668 primary total hip replacements for primary osteoarthritis in patients under the age of 55 years

Mäkelä¹,

Eskelinen²,

Pulkkinen³

et al. 2011

Acta Orthopaedica

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Background and purposeIn a previous study based on the Finnish Arthroplasty Register, the survival of cementless stems was better than that of cemented stems in younger patients. However, the survival of cementless cups was poor due to osteolysis. In the present study, we analyzed population-based survival rates of the cemented and cementless total hip replacements in patients under the age of 55 years with primary osteoarthritis in Finland.Patients and methods3,668 implants fulfilled our inclusion criteria. The previous data included years 1980–2001, whereas the current study includes years 1987–2006. The implants were classified in 3 groups: (1) implants with a cementless, straight, proximally circumferentially porous-coated stem and a porous-coated press-fit cup (cementless group 1); (2) implants with a cementless, anatomic, proximally circumferentially porous-coated stem, with or without hydroxyapatite, and a porous-coated press-fit cup with or without hydroxyapatite (cementless group 2); and (3) a cemented stem combined with a cemented all-polyethylene cup (the cemented group). Analyses were performed separately for 2 time periods: those operated 1987–1996 and those operated 1997–2006.ResultsThe 15-year survival for any reason of cementless total hip replacement (THR) group 1 operated on 1987–1996 (62%; 95% CI: 57–67) and cementless group 2 (58%; CI: 52–66) operated on during the same time period was worse than that of cemented THRs (71%; CI: 62–80), although the difference was not statistically significant. The revision risk for aseptic loosening of cementless stem group 1 operated on 1987–1996 (0.49; CI: 0.32–0.74) was lower than that for aseptic loosening of cemented stems (p = 0.001).InterpretationExcessive wear of the polyethylene liner resulted in numerous revisions of modular cementless cups. The outcomes of total hip arthroplasty appear to have been relatively unsatisfactory for younger patients in Finland.

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“…Some studies have a shown an association between seasonal variations in incidence and meteorological factors, namely temperature and relative humidity (Kanno et al, 1983 McConnel and Tobias, 1986;Kobayashi and Takaki,1992;Chang and Halfon,1997) and to study mortality (hurray and Lopez, 1997; Kawachi and Kennedy, 1997;Llorca et al, 1998). Lee (1996) proposed the use of the countries (Nakamura et al, 1998;Peltola, 1982;Sumi, 1998). Therefore, we introduced (max/min) value was also very high.…”

Section: Features Of the Cumulative Percentage Curves For Different Pmentioning

confidence: 99%

A new statistical approach to the analysis of infectious gastroenteritis incidence in Japan using the cumulative percentage curve, the modified Lorenz curve and the modified Gini index.

Kokaze

Yoshida

Sekine

et al. 2001

Jpn. J. Health Hum. Ecol

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To characterize the features of epidemic patterns of infectious gastroenteritis among 47 prefectures in Japan, we have introduced the use of two new statistical methods, the modified Lorenz curve and the modified Gini index, which are usually used in economics and demography. These statistical methods are reported to be suitable for the analysis of seasonal variations and were used in conjunction with the cumulative percentage curves. We attempted to apply these new methods using data collected from the surveillance of infectious diseases in Japan. The results suggest that cumulative percentage curves may be useful for the monitoring of infectious gastroenteritis epidemics in several prefectures. The modified Lorenz curve and the epidemic index, namely the modified Gini index, may also be useful as standards for comparing the epidemic features of infectious diseases for epidemic patterns that are characterized by temporal changes within the same prefecture. Such application could enable essential differences among different prefectures and different infectious diseases to be described.

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Observations on the seasonal variation of the most common acute pediatric diseases in the Helsinki area (Finland)

Cited by 10 publications

References 27 publications

Seasonal Variation of Childhood Acute Lymphoblastic Leukaemia is Different Between Girls and Boys

Seasonal Variation of Childhood Acute Lymphoblastic Leukaemia is Different Between Girls and Boys

Results of 3,668 primary total hip replacements for primary osteoarthritis in patients under the age of 55 years

A new statistical approach to the analysis of infectious gastroenteritis incidence in Japan using the cumulative percentage curve, the modified Lorenz curve and the modified Gini index.

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