Occurrence of hypothermia ( body temperature below 35 degrees Celsius ) among the elderly. Type of residence: heating, insulation, location, conveniences size / cold, draught, dampness in house / satisfaction with neighbourhood, social contacts, loneliness / satisfaction with personal income, consequences of cuts in government budget for the elderly / dietary habits, use of alcohol / shopping, going outdoors / schedule, taking rest, activity / interest in newscast / domestic help / health: mental and physical condition, use of medicines, medical treatments / body temperature.Background variables: basic characteristics/ residence/ housing situation/ income/capital assets/ readership, mass media, and 'cultural' exposure