| SJ | Jaccard coefficient |
|---|---|
| SJA | Schwartz-Jampel-Aberfeld [syndrome] |
| SjO2 | jugular bulb venous oxygen saturation |
| SJR | Shinowara-Jones-Reinhart [unit] |
| SJS | Stevens-Johnson syndrome; stiff joint syndrome; Swyer-James syndrome |
| SjS | Sjogren syndrome |
| SjVO2 | jugular venous oxygen saturation |