One study showed that the short-term effective rate was similar between chemonucleolysis (CNL) and percutaneous laser disc decompression (PLDD), but the long-term effective rate of PLDD was superior to that of CNL (RR 0.35, 95%CI 0.13 to 0.96).

• 其中:1个研究比较了胶原酶与激光椎间盘减压术(PLDD)治疗腰椎间盘突出症的效果；结果显示近期疗效差异无统计学意义；远期优良率差异(>1年)有统计学意义[RR0.；35；95%25CI(0