Table 2. Checklist for data extraction from the selected articles.
IMI: Intramuscular injection
| Sr. no | Data Collected | Data Ignored |
| 1 | Whether any new site for deltoid IMI is proposed | Information about any technique of administering deltoid IMI |
| 2 | Whether any reason is mentioned for recommending the proposed deltoid IM site | Information about importance of needle depth and angle of needle insertion at the time of administering IM |
| 3 | Whether any site is not recommended or marked as high risk for deltoid IMI | Information about importance of measuring the thickness of subcutaneous tissue at the IM site |
| 4 | Whether any reasons are mentioned for not recommending any deltoid IM site | Information about importance of choosing the type of needle while administering IMI |
| 5 | Whether any neurovascular structures are underlying the not-proposed IM site | |
| 6 | Mention of any post-injection complications occurring after deltoid IMI | |
| 7 | Critical appraisal of currently used techniques for deltoid IMI | |
| 8 | Reference to common mistakes committed by healthcare workers in administering deltoid IMI | |
| 9 | Variations in the pattern of neurovascular structures in proximity to the deltoid muscle |