Table 3. Recovery rate of SPSL and conventional laminectomy for lumbar disorders.

F/U: follow-up, RR: recovery rate, SPSL: spinous process-splitting laminectomy

Authors	SPSL		conventional laminectomy
	RR (%)	F/U (months)	RR (%)	F/U (months)
Watanabe et al. (2005) [13]	67.6	29	59.2	38.7
Watanabe et al. (2011) [14]	75	12	74	12
Uehara et al. (2014) [15]	63.8	24	40.3	24
Kanbara et al. (2015) [16]	64.2	12	68.7	12
Maruo et al. (2015) [17]	60.1	31.2
Range (min-max)	60.1-75.0	12.0-31.2	40.3-74.0	12.0-38.7