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

Table 5. The grade of lumbar disc degeneration at each lumbar vertebral level in 2016, as defined by the Pfirrmann classification^*.

2016 Pfirrmann classification	Grade Ⅰ	Grade Ⅱ	Grade Ⅲ
L1/2	9	2	1
L2/3	10	2	0
L3/4	11	1	0
L4/5	4	6	2
L5/S1	10	1	1

*The lumbar disc degeneration was noted to be irreversible when compared to the findings in 2015.

Table 5. The grade of lumbar disc degeneration at each lumbar vertebral level in 2016, as defined by the Pfirrmann classification*.