Table 1.
Top 10 Countries by Degenerative Cervical Myelopathy Research Paper Output Between 1995 and 2015.a
| Country | Papers, n (%) | r | P |
|---|---|---|---|
| Japan | 450 (30.3) | 0.82 | .001 |
| United States | 290 (19.5) | 0.86 | .001 |
| China | 178 (12.0) | 0.88 | .001 |
| South Korea | 71 (4.8) | 0.87 | .001 |
| Canada | 57 (3.8) | 0.83 | .001 |
| India | 57 (3.8) | 0.77 | .001 |
| Germany | 49 (3.3) | 0.48 | .027 |
| United Kingdom | 41 (2.7) | 0.53 | .013 |
| Italy | 34 (2.3) | 0.33 | .146 |
| Czech Republic | 28 (1.9) | 0.47 | .031 |
| Other | 230 (15.6) | 0.92 | .001 |
a Spearman’s correlation coefficients were calculated to identify trends in growth of paper output by country (r) for which significance testing was conducted and P values are reported.