The UK government defines gender as: "a social construction relating to behaviours and attributes based on labels of masculinity and femininity; gender identity is a personal, internal perception of oneself and so the gender category someone identifies with may not match the sex they were assigned at birth where an individual may see themselves as a man, a woman, as having no gender, or as having a non-binary gender – where people identify as somewhere on a spectrum between man and woman.
Based on the above mentioned concept, would it be reasonable to express gender not qualitatively, but quantitatively (e.g. as self-reported score reflecting how much 'masculine' or 'feminine' an individual is self-identified on a visual analogue scale)?