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Table 2 Sub-group analysis comparing hip fracture and non-hip fracture studies’ definitions of elderly age

From: Heterogeneity of the definition of elderly age in current orthopaedic research

  Median age Range Standard deviation Variance
Hip fracture studies (n = 24) 65 50–80 6.08 36.83
Non hip fracture studies (n = 52) 65 50–75 5.90 34.83
Comparison of data samples with a two tailed Man Whitney test p = 0.158
  1. Non-parametric analysis between the two groups reveals no significant difference between the two populations (p > 0.05). There were two studies in each group that are excluded from the results displayed in this table that failed to define the elderly population they were studying