title: Differentials in survivorship of the older populations among areas within a state. The case of Pennsylvania.
abstract: It has often been assumed when making estimates or projections of populations of sub-state areas that survival ratios of the state, region, or even the nation may be used since significant differentials are not expected within the state. The validity of this assumption is questioned, employing single-year-of-age survival ratios estimated for each planning and service area in Pennsylvania. Regression analysis estimations were made to determine whether the survival functions of the areas were statistically the same as the survival functions of the state. The survival functions were partitioned into two groups by age; a 10 to 49 year age group and a 50 to 84+ year age group. Briefly, the results indicated that, at least for Pennsylvania significant differences existed and that these differences are more likely to occur among the older group.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D006801:Humans; D008875:Middle Aged; D009026:Mortality; D010414:Pennsylvania; D012044:Regression Analysis