Table 2.

Annual number of inpatient surgeries performed among patients with cervical degenerative disease grouped by sex (2000-2016).

Year	Surgeries in male patients, n	Surgeries in female patients, n	M/Fa	M/F_Cb,c
2000	260	114	2.28	1.07
2001	307	134	2.29	1.06
2002	352	124	2.84	1.06
2003	333	131	2.54	1.06
2004	560	219	2.56	1.06
2005	632	333	1.90	1.06
2006	635	318	2.00	1.06
2007	657	381	1.72	1.06
2008	819	402	2.04	1.06
2009	824	435	1.89	1.06
2010	984	502	1.96	1.05
2011	1044	610	1.71	1.05
2012	1166	655	1.78	1.05
2013	1099	714	1.54	1.05
2014	1272	763	1.67	1.05
2015	1144	656	1.74	1.05
2016	1038	671	1.55	1.05

^aRatio of the number of inpatient surgeries performed in male patients to the number of inpatient surgeries performed in female patients.

^bMale-to-female ratio in the Chinese population.

^cCalculation of M/F_C was based on data from the National Bureau of Statistics of China [25].