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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)