| ADAM | Androgen Deficiency in Ageing questionnaire |
| BDI | Beck Depression Inventory |
| DMTs | Disease-modifying therapies |
| EDSS | Expanded Disability Status Score |
| FSH | Follicle-stimulating hormone |
| fT | Serum free testosterone |
| 9-HTP | Nine-hole peg test |
| INF | Interferon |
| LH | Luteinizing hormone |
| MRI | Magnetic resonance imaging |
| MSIS-29 | Multiple Sclerosis Impact Scale-29 |
| RRMS | Relapsing–Remitting Multiple Sclerosis |
| SDMT | Symbol Digit Modalities Test |
| T25FW | Timed 25-foot walk |
| TT | Serum total testosterone |
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