Table 2.
Frequency of different types of variables from the 33 studies included in this systematic review.
| Variable | n | % |
|---|---|---|
| Study | ||
| Descriptive | 22 | 67 |
| Case-control | 11 | 33 |
| Population group | ||
| Female | 6595 | 63 |
| Male | 318 | 3 |
| Kids | 293 | 3 |
| Not specified | 3192 | 31 |
| Sample | ||
| B.M. | 1 | 2.6 |
| BM & PB | 1 | 2.6 |
| BTFFP | 19 | 50 |
| Fresh breast tissue | 1 | 2.6 |
| P.B./ Cell fraction | 8 | 21 |
| P.B./ Serum | 5 | 13.2 |
| P.B./ Cell fraction & serum | 3 | 8 |
| Technique | ||
| AGID assay | 3 | 6.8 |
| Complement fixation test | 1 | 2.3 |
| ELISA | 4 | 9 |
| IHC | 3 | 6.8 |
| Immunoblotting | 1 | 2.3 |
| Immunoperoxidase | 1 | 2.3 |
| Nested PCR | 13 | 29.5 |
| Nested PCR & Nested In situ PCR | 1 | 2.3 |
| PCR | 6 | 13.6 |
| PCR In situ | 7 | 15.9 |
| qPCR | 1 | 2.3 |
| Southern blot | 1 | 2.3 |
| WSG | 2 | 4.5 |
| Target | ||
| env | 8 | 13 |
| gag | 12 | 19 |
| tax | 16 | 26 |
| pol | 5 | 8 |
| px | 1 | 2 |
| LTR | 4 | 6 |
| WSG | 1 | 2 |
| gp51 | 4 | 6 |
| p24 | 6 | 10 |
| Not specified | 5 | 8 |
P.B.: Peripherally blood, BTFFP: Breast tissue specimen fixed in neutral formalin and embedded in paraffin, B.M.: Bone marrow, WSG: Whole genome sequencing, IHC: Immunohistochemistry, AGID: Agar gel immunodiffusion, ELISA: Enzyme-Linked ImmunoSorbent Assay, PCR: Polymerase Chain Reaction.