Open Access

Table 1.

Mean pre-injection and post-injection NRS (back) and ODI for lumbar multifidus muscle PLRP injection through the follow-up period.

Outcome Pre-inj. scores Day 1 6 months 12 months 18 months 24 months Difference in group means (95% CI)
NRS-back pain 8.8 ± (0.86) 7.2 ± (1.1) 4.57 ± (2.48) 3.45 ± (2.94)[1] 3.48 ± (2.93)[2] 3.5 ± (2.92) 5.31 ± (2.90)
ODI 73.48% (3.95) 63.1% (4.5) 29.44% (12.8)[3] 29.28% (12.8)[4] 29.26% (12.8)[5] 29.3% (12.8) 44.18% (12.7)

Values are mean standard deviation (SD), NRS = Numerical Rating Scale (0–10), ODI = Oswestry Disability Index, CI = Confidence Interval, the mean ODI score is multiplied by two to give the mean disability score which is expressed in the table. Difference in group means is expressed as the difference between pre-injection and post-injection values at the end of follow-up period. The mean ODI and (NRS) back scores for lumbar multifidus PLRP injection showed significant improvement at the end of the 2-years follow-up period, the mean ODI and (NRS) back scores showed statistically insignificant changes and remained low without significant increase again after initial significant improvement that started at the day-1 follow-up that reached maximum improvement by 6–12 months follow-up period post-injection. P (paired t test) < 0.001 *[1] P = 0.181, [2] P = 0.32, [3] P = 0.083, [4] P = 0.741, [5] P = 0.32.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.