The principal component structure of the general health questionnaire among Greek and Turkish adolescents

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Abstract
The 28-item version of the General Health Questionnaire was administered to Greek and Turkish school pupils in their mother country as well as to Greeks in Munich. Principal component analysis with varimax rotation was carried out separately for both the individual populations and sexes separately. Visual inspection of the matrices suggested overall agreement with the sub-scales obtained by Goldberg and Hillier (1979). The coefficient of factor similarity, calculated between matrices, suggested a highly similar principal component structure between the population samples as a whole and separately for the sexes living in their own country, but not between male and female Greek pupils in Germany. Highly similar component matrices were obtained for Greek males living in Greece with those in Germany, but not for females.