Investigating age and regional effects on the relation between the incidence of heat-related ambulance transport and daily maximum temperature or WBGT

BACKGROUND@#Although age and regional climate are considered to have effects on the incidence ratio of heat-related illness, quantitative estimation of age or region on the effect of occurring temperature for heat stroke is limited.@*METHODS@#By utilizing data on the number of daily heat-related ambulance transport (HAT) in each of three age groups (7-17, 18-64, 65 years old, or older) and 47 prefectures in Japan, and daily maximum temperature (DMT) or Wet Bulb Globe Temperature (DMW) of each prefecture for the summer season, the effects of age and region on heat-related illness were studied. Two-way ANOVA was used to analyze the significance of the effect of age and 10 regions in Japan on HAT. The population-weighted average of DMT or DMW measured at weather stations in each prefecture was used as DMT or DMW for each prefecture. DMT or DMW when HAT is one in 100,000 people (T@*RESULTS@#HAT of each age category and prefecture was plotted nearly on the exponential function of corresponding DMT or DMW. Average R@*CONCLUSIONS@#Age and regional differences affected the incidence of HAT. Thus, it is recommended that public prevention measures for heat-related disorders take into consideration age and regional variability.

Incidence of summer associated symptoms, host susceptibility and their effect on quality of life among women 18 to 40 years of age in an urban slum of Delhi.

OBJECTIVES: To study whether individual susceptibility plays a role in the occurrence of summer associated symptoms (dizziness, giddiness, fainting and weakness) among women 18-40 years of age and their effect on the quality of life. METHODS: It was a prospective community based study carried out in an urban slum of Delhi as a follow up of an earlier study. All women who had "given symptoms" during summer in the earlier study and a sample of those who were asymptomatic were included in the current study. Both the groups were studied for the occurrence of "given symptoms" and quality of life during next summer and winter using a pre structured questionnaire and WHOQOL-BREF. RESULTS: Incidence of "given symptoms" during summer was more than three times among women who were symptomatic earlier compared to women who were asymptomatic. The incidence of these symptoms was significantly higher among the former across different age groups and BMI categories. Their physical domain of quality of life was also adversely affected. CONCLUSIONS: Continued high incidence of summer associated symptoms with adverse effect on their physical quality of life, among women who were symptomatic earlier too, points to individual susceptibility rather than random occurrence. This aspect requires for further studies.