Table 2.

Agreement between self-assigned and observed skin colour of the participants

Skin colour	Overall agreement	Kappa (95% Cl)
White	95%	0.75 (0.72–0.78)
Mixed	55%	0.61 (0.58–0.64)
Black	90%	0.89 (0.86–0.92)
Global	78%	0.75 (0.71–0.79)