Table 2.

Top 5 Countries by Number of Degenerative Cervical Myelopathy Research Patients Between 1995 and 2015.^a

Country	Patients n (%)	r	P
United States	3 674 737 (89.2)	0.74	.001
Japan	230 176 (5.6)	0.92	.001
Taiwan	148 206 (3.6)	0.85	.001
China	16 597 (0.4)	0.80	.001
Canada	14 670 (0.4)	0.82	.001
Other	32 665 (0.8)	0.83	.001

^a Spearman’s correlation coefficients (r) were calculated to identify trends in the number of patients on which data was published each year by each country. Significance testing was conducted and P values are reported.