Table 2.

Comparison of the N/T ratio* in the first and second half of the period in nationwide Japan

Period**		First	Second
Male	65–74	1.181 (7709/6528)	1.392 (9955/7152)
	75–84	0.915 (14,853/16,236)	1.067 (19,189/17,992)
	≤85	0.746 (10,166/13,624)	0.823 (16,330/19,836)
Female	65–74	2.110 (21,160/10,029)	2.515 (25,389/10,094)
	75–84	1.060 (54,685/51,596)	1.178 (62,173/52,776)
	≤ 85	0.596 (53,138/89,198)	0.609 (71,611/11,7496)

^*N/T ratio, the ratio of patients with femoral neck fractures to those with trochanteric fractures

^**Period: “First” means the first half of the period (2008–2012) and “second” means the second half of the period (2013–2017)

The analysis was based on the hip fracture data distributed annually by the Japanese Orthopedic Association

The figures in parentheses indicate the actual number of occurrences

For all items, there are significant differences between the first and second half of the period (chi-square test p < 0.0005)