Female sterilization in Aberdeen: Preliminary findings

2,500 women whose first marriage was continuing and who were living with their husbands at the time of hospital admission were sterilized in Aberdeen between 1963 and 1971. The social and demographic characteristics of these women are analysed, and a preliminary analysis by marriage cohort is presented. Those marriage cohorts in which sterilization was being performed for the first time mainly on young women with small families are identified. The family size of sterilized women was found to be substantially higher than that of women from the same marriage cohort who had not undergone the procedure. The contribution to total fertility made by the various forms of foetal wastage is assessed. Women whose sterilization was performed in association with a termination of pregnancy were found to have patterns of foetal loss which differed markedly from those of women who were not pregnant at the time of the operation.     

New Section on Social Statistics

The analysis of a general k-factor factorial experiment having unequal numbers of observations per cell is complex. For the special case of a 2 ^k experiment with unequal numbers of observations per cell, the method of unweighted means provides a simple vehicle for analysis that requires no matrix inversion and can be used with existing software programs for the analysis of balanced data. All numerator sums of squares for testing main effects and interactions are χ² with one degree of freedom. In addition, for tests having one degree of freedom in any factorial experiment, the method of unweighted means may be modified to yield exact tests.