Table 2 Classification of the IL-6 scale found in the systematic review
Categorical only (21) * | Binary (15) | |
|---|---|---|
Three categories (2) | ||
Four categories (3) | ||
Binary and four categories (1) | ||
Continuous only, or likely to be continuous only (33) | Logarithmic scale (15) | Base ten (9)) |
Natural Logarithm (3) | ||
Expressed in units of the SD (2) | ||
Likely to be logarithmic scale (1) (but unclear) | ||
Linear Scale (18) | Per 1 pg/ ml (12) | |
Likely 1 pg/ ml (3) (but unclear) | ||
Per 10 pg/ml (3) | ||
Both continuous and categorical* (3) | Three categories and natural logarithmic (1) | |
Three categories and 1 pg/ml (1) | ||
Four categories and 1 pg/ml (1) | ||
Unclear modelling method (3) | ||