. 2021 Sep 13;2021:9149315. doi: 10.1155/2021/9149315

Table 1.

Characteristics of each study.

Study	Registered number	Design	Participants	Intervention		Dosage	Follow-up	Outcomes
Study	Registered number	Design	Participants	MSC group	Control group	Dosage	Follow-up	Outcomes
Amirdelfan et al. [18] 2021	NCT01290367	RCT	80	MSC+HA	HA	6 × 10⁶, 1.8 × 10⁷	36 m	VAS,ODI, AE, CSC, MIC
Noriega et al. [17] 2021	NCT01860417	RCT	24	MSC	Mepivacaine	2.50 × 10⁷	42 m	VAS, ODI, AE
Noriega et al. [15] 2017	NCT01860417	RCT	24	MSC	Mepivacaine	2.50 × 10⁷	12 m	VAS, ODI, AE

Note: AE: adverse event; CSC: clinically significant change; HA: hyaluronic acid; ODI: Oswestry Disability Index; MIC: minimally important change; MSC: mesenchymal stem cell; RCT: randomized controlled trial; VAS: visual analog scale.