The effect of applying ethnicity-specific spirometric reference equations to Asian migrant workers in Korea

Table 1 Predicted FEV ₁ and FVC of a given 30-year-old, 70-kg, 170-cm-tall male calculated using spirometric reference equations

Spirometric equations	Country of development	Number of subjects		Predicted equations ^*		Predicted value (L)
Spirometric equations	Country of development	Male	Female	Predicted equations ^*		Predicted value (L)
NHANES III (1999)	USA	898	1383	FEV₁	0.5536 – 0.01303a – 0.00017a² + 0.000141h²	4.08
NHANES III (1999)	USA	898	1383	FVC	−0.1933 + 0.00064a – 0.00027a² + 0.000157h²	4.12
Ethnicity-specific equations
Korean (2013)	South Korea	706	4047	FEV₁	0.61493 – 0.00025410a² + 0.00012644h² – 0.00262w	3.30
Korean (2013)	South Korea	706	4047	FVC	1.19135 – 0.00000219a³ + 0.0000006995642h³	4.57
East Asian (2006)	Hong Kong, China	494	595	FEV₁	2.404 – 0.0254a + 0.03978h	3.60
East Asian (2006)	Hong Kong, China	494	595	FVC	4.424 – 0.0193a + 0.05434h	4.23
Southeast Asian (2011)	Malaysia	222	310	FEV₁	– 1.284 – 0.027a + 0.03167h	3.29
Southeast Asian (2011)	Malaysia	222	310	FVC	2.176 – 0.027a + 0.03889h	3.63
Central Asian (1999)	Mongolia	176	168	FEV₁	2.0956 – 0.02411a + 0.04052h	4.07
Central Asian (1999)	Mongolia	176	168	FVC	3.5922 – 0.01532a + 0.05207h	4.80
South Asian (2007)	Pakistan	321	183	FEV₁	1.440 – 0.020a + 0.030h	3.06
South Asian (2007)	Pakistan	321	183	FVC	0.848 – 0.020a + 0.032h	3.99

*a: age (year), h: height (cm), w: weight (kg).
FEV; Forced expiratory volume, FVC; Forced vital capacity, NHANES; National Health and Nutrition Examination Survey.

ISSN: 2052-4374