blood_count_ratios

blood_count_ratios(
    data,
    *,
    units=None,
    neutrophils='neutrophils',
    lymphocytes='lymphocytes',
    monocytes='monocytes',
    platelets='platelets',
)

NLR, PLR, LMR and SII from a complete blood count.

Not clocks: inflammation readouts that need a blood count and nothing else, each a ratio of counts as its literature defines it:

nlr neutrophils / lymphocytes (Buonacera et al. 2022, Int J Mol Sci 23:3636, doi:10.3390/ijms23073636) plr platelets / lymphocytes (Gasparyan et al. 2019, Ann Lab Med 39:345, doi:10.3343/alm.2019.39.4.345) lmr lymphocytes / monocytes (Stotz et al. 2014, Br J Cancer 110:435, doi:10.1038/bjc.2013.785) sii platelets x neutrophils / lymphocytes, in 10^9/L (Hu et al. 2014, Clin Cancer Res 20:6212, doi:10.1158/1078-0432.CCR-14-0442)

Units are declared, as for every clinical input (units=, or the data’s own units). NLR and LMR are the same whether both counts are absolute or both are percentages of leukocytes, since the leukocyte count cancels; PLR and SII need absolute counts. A ratio whose inputs are absent, or in units that cannot give it, is left out and the reason is in attrs.