Electricity use is associated with residents' vital data and lifestyles: observational study using an IT health support system in Japan.

Motivated by developments in information technology, recording personal parameters with health devices is effective in health promotion. Today's indoor individual lifestyles often involve using electrical appliances. We developed a health support system combined with wireless electricity monitoring and investigated whether electricity use is associated with residents' vital data and lifestyles. We recruited 116 participants in February 2013. Their vital and electricity use data were collected daily. They completed a self-administered questionnaire. Among participants living alone, electricity from 20 February to 11 March 2013 was negatively associated with high-density lipoprotein (HDL) (P = 0.008) and positively associated with low-density lipoprotein (LDL) (P = 0.007) and neutral fat (P = 0.020) levels. Among all participants, electricity use was negatively associated with vegetable intake (P = 0.044) and step count (P = 0.040). Temperature sensitivity in winter was negatively associated with the LDL/HDL ratio for both men and women. For men, temperature sensitivity in winter was negatively related with alcohol intake; for women, it was positively related to body fat percentage and abdominal circumference and negatively correlated to vegetable intake. Temperature sensitivity in summer was positively associated with vegetable intake for men and women. In conclusion, electricity use was related to vital data and lifestyles and influenced by temperature.