Fig. 3From: Spirometric reference equations for Cameroonians aged 4 to 89 years derived using lambda, mu, sigma (LMS) methodComparison of our prediction equations of FEV1 and FEV1/FVC ratio with other reference equations using mean height for each age group. FEV1, forced expiratory volume in 1 s (FEV1); FVC, forced vital capacity. Equations 1 orange line, 2 green line, 3 blue line, 4 violet line. 1, current study; 2, GLI 2012 African Americans; 3, GLI 2012 other ethnic groups; 4, Fawibe et al. Nigerian equationsBack to article page