. 2018 Oct 29;13(10):e0206125. doi: 10.1371/journal.pone.0206125

Table 4. The grade of lumbar disc degeneration at each lumbar vertebral level in 2015, as defined by the Pfirrmann classification^*.

2015 Pfirrmann classification	Grade Ⅰ	Grade Ⅱ	Grade Ⅲ
L1/2	10	1	1
L2/3	10	2	0
L3/4	11	1	0
L4/5	6	4	2
L5/S1	10	2	0

*There degenerative changes were higher in 2015 than in 2014.

Table 4. The grade of lumbar disc degeneration at each lumbar vertebral level in 2015, as defined by the Pfirrmann classification*.