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Table.1 Reasons for exclusion of participants

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

Reasons Children and adolescents (4–18 years)
n = 1098 (%)
Adults (≥ 19 years)
n = 5055 (%)
Unacceptable maneuvers 137 (12.5) 935 (18.5)
Respiratory symptoms 104 (9.5) 550 (10.9)
Chronic respiratory diseases 72 (6.6) 510 (10.1)
Obesity 32 (2.9) 1382 (27.3)
Tobacco smoking 54(4.9) 844(16.7)
Others 86(7.8) 211 (4.2)