Dataset Information

Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010.

ABSTRACT:

Objectives

Suicide peaks in late spring and October are still seen in Finland among many countries. Weather factors have been suggested as explanations for these peaks, although with inconsistent results. Since the exact timing of these peaks varies each year, the length of daylight and changes in it seem inadequate as an explanation. We hypothesized that ambient temperature and the timing of thermal seasons might associate with suicide rate.

Methods

Suicide rates from three areas across Finland (N = 10,802) were analyzed with Poisson regression in six different models against variables calculated from the local ambient daily temperature, diurnal temperature range, and the duration from the onset of thermal seasons. Separate models for men and women were constructed.

Results

The temperature change over 5 days associated with the suicide rate of men in Helsinki region, or in other words, the lower the suicide rate was, the higher the temperature decrease had been. For women, the results were more inconsistent.

Conclusions

Our study is in line with some earlier studies which imply that impairment of thermoregulation might exist among suicide victims.

SUBMITTER: Hiltunen L

PROVIDER: S-EPMC4085253 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature

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Publications

Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010.

Hiltunen Laura L Haukka Jari J Ruuhela Reija R Suominen Kirsi K Partonen Timo T

Environmental health and preventive medicine 20140503 4

<h4>Objectives</h4>Suicide peaks in late spring and October are still seen in Finland among many countries. Weather factors have been suggested as explanations for these peaks, although with inconsistent results. Since the exact timing of these peaks varies each year, the length of daylight and changes in it seem inadequate as an explanation. We hypothesized that ambient temperature and the timing of thermal seasons might associate with suicide rate.<h4>Methods</h4>Suicide rates from three areas ...[more]

PMID: 24794752

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Project description:BackgroundOne dose of pandemic influenza vaccine Pandemrix (GlaxoSmithKline) was offered to the entire population of Finland in 2009-10. We conducted a prospective clinical cohort study to determine the vaccine effectiveness in preventing febrile laboratory-confirmed influenza infection during the influenza season 2009-10 and continued the study in 2010-11.MethodsIn total, 3,518 community dwelling adults aged 18-75 years living in Tampere city were enrolled. The participants were not assigned to any vaccination regimen, but they could participate in the study regardless of their vaccination status or intention to be vaccinated with the pandemic or seasonal influenza vaccine. They were asked to report if they received Pandemrix in 2009-10 and/or trivalent influenza vaccine in 2010-11. Vaccinations were verified from medical records. The participants were instructed to report all acute symptoms of respiratory tract infection with fever (at least 38°C) and pneumonias to the study staff. Nasal and oral swabs were obtained within 5-7 days after symptom onset and influenza-specific RNA was identified by reverse transcription polymerase chain reaction.ResultsIn 2009-10, the estimated vaccine effectiveness was 81% (95%CI 30-97). However, the vaccine effectiveness could not be estimated reliably, because only persons in prioritized groups were vaccinated before/during the first pandemic wave and many participants were enrolled when they already had the symptoms of A(H1N1)pdm09 influenza infection. In 2010-11, 2,276 participants continued the follow-up. The vaccine effectiveness, adjusted for potential confounding factors was 81% (95%CI 41-96) for Pandemrix only and 88% (95%CI 63-97) for either Pandemrix or trivalent influenza vaccine 2010-11 or both, respectively.ConclusionVaccination with an AS03-adjuvanted pandemic vaccine in 2009-10 was still effective in preventing A(H1N1)pdm09 influenza during the following epidemic season in 2010-11.Trial registrationClinicalTrials.gov NCT01024725. NCT01206114.

Dataset Information

Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010.

Objectives

Methods

Results

Conclusions

Publications

Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010.

Similar Datasets

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