Table 4. A summary of the fourteen published studies with clinical outcomes for surgical intervention of tarsal tunnel syndrome.

Lead Author	Year	Journal	Institution	Study Type	Level of evidence	Number of patients	Surgical procedure	Success Measure	Success Rate	Complication Rate	Reported Complications	Length of follow up
William H. Gondring M.D.8	2009	Foot and Ankle Surgery	Heartland Health	Prospective cohort	Level I	32	Tarsal Tunnel Release	Nursing history assessment, patient questionnaire, visual anatomic pain scale	All patients were satisfied	1 reported	Wound dehiscence	5 weeks
Xin Yu4	2020	Cell and Tissue Banking	First Hospital of Jilin University	Case series	Level IV	107	Singh method and non-singh method Tarsal Tunnel Release	Takakura evaluation criteria	62% had excellent or good outcomes	15/107	poor post operative outcome, Transient ischemia attack, long term pain medication use	5-74 months, avg-26 months
Masatoshi Yunoki13	2020	Asian Journal of Neurosurgery	Kagawa Rosai Hospital	Case series	Level IV	5	Tarsal Tunnel Release	Takakura evaluation criteria, Mondelli's scale	4 of 5 good or excellent	2 of 5	fluid leakage from the wound	none reported
Murat Gulcek7	2019	Foot and Ankle Surgery	Ankara Numune Education and Research Hospital, Ankara, Turkey	Case series	Level IV	66	Tarsal Tunnel Release	FFI index and questionnaire	45.1% very satisfied, 16.9% minor symptoms	18% no improvement, 18.3% continued symptoms	Not satisfied	9 years
Paweł Reichert10	2015	Foot and Ankle Surgery	Wroclaw Medical University	Case series	Level IV	31	Tarsal Tunnel Release	Vas and AOFAS scores	71% good/very good, 22% satisfactory	7% reported bad, 2% reported unsatisfactory	Bad, unsatisfactory surgical outcomes	12 months
Kyongsong Kim15	2014	Neurologia Medico-Chirurgica	Chiba Hokuso Hospital	Case series	Level IV	69	Neurovascular bundle decompression	Patient self satisfaction assessments	47 of 69 were satisfied	9/69	Surgical failure	none reported
Ki-sun Sung14	2009	Foot and Ankle International	Sungkynkwan University	Case series	Level IV	20	Tarsal Tunnel Release	VAS and AOFAS scores, subjective satisfaction	54% satisfied	15/107	numbness, tingling, hypoesthesia	14.5 months
J. Jerosch5	2006	Foot and Ankle Surgery	Johanna-Etienne Hospital	Case series	Level IV	75	Tarsal Tunnel Release	Vas and AOFAS scores	43/75 satisfied, 53/75 improved VAS	Number not reported	Superficial Wound infections	6-100 months (avg 39 months)
William H. Gondring M.D.23	2003	Foot and Ankle International	Heartland Health	Case series	Level IV	60	Tarsal Tunnel Release	Objective and Subjective symptom relief	85% objective, 51% subjective	none reported	n/a	None reported
G. James Sammarco2	2003	Foot and Ankle International	Tulane University School of Medicine	Case series	Level IV	62	Tarsal Tunnel Release	MFS and AOFAS scores	Statistically significant improvement in MFS scores postoperatively	none reported	n/a	58 months
Michihiro Kohno9	2000	Journal of Neurology Neurosurgery and Psychiatry	Tokyo Medical University	Case Series	Level IV	9	Tarsal tunnel opening and neurovascular decompression	Resolution on sensory disturbance	6 complete resolution, 3 partial resolution	none reported	n/a	26.8 months
Akira Mori20	1997	Orthopedics and Traumatology	Fukuoka University Chikushi Hospital	Case series	Level IV	6	Tarsal Tunnel Release	Sensory recovery	all patients had sensory recovery	none reported	n/a	none reported
Tetsuki Sato21	1991	Orthopedics and Traumatology	Fukuoka University Chikushi Hospital	Case series	Level IV	10	Tarsal Tunnel Release	Sensory recovery	all patients had sensory recovery	none reported	n/a	none reported
Yoshinori Takakura22	1991	Journal of Bone and Joint Surgery	Nara Medical Univsersity	Case series	Level IV	45	Tarsal Tunnel Release	Takakura evaluation criteria	Not reported	none reported	n/a	4 years 9 months on average