Table 2.

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

	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

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