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Fig. 3 | BMC Pulmonary Medicine

Fig. 3

From: Spirometric reference equations for Cameroonians aged 4 to 89 years derived using lambda, mu, sigma (LMS) method

Fig. 3

Comparison 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 equations

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