Development of a Rasch-type loneliness scale.Number of important relationships / most important and second important person e.g. husband, partner, relatives, neighbour etc. / conversation topics with most important and second important person / being the most important person for other people and type of discussed problems / wish to improve achieved relationships / wish to get new relationships / satisfaction with achieved relationships / r's self rating concerning relationships / kind of relationship with husband / wife / partner / unmarried respondents and respondents who are not living together: missing a partner / husband / wife / feeling lonely at present or in the past / r's description of some personality characteristics / development of a Rasch-type loneliness scale / deprivation / abandonment / missing companionship.Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment