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) | ||
|---|---|---|---|---|---|---|
| Male | Female | |||||
| NHANES III (1999) | USA | 898 | 1383 | FEV1 | 0.5536 – 0.01303a – 0.00017a2 + 0.000141h2 | 4.08 |
| 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 |
| 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 |
| FVC | 4.424 – 0.0193a + 0.05434h | 4.23 | ||||
| Southeast Asian (2011) | Malaysia | 222 | 310 | FEV1 | – 1.284 – 0.027a + 0.03167h | 3.29 |
| FVC | 2.176 – 0.027a + 0.03889h | 3.63 | ||||
| Central Asian (1999) | Mongolia | 176 | 168 | FEV1 | 2.0956 – 0.02411a + 0.04052h | 4.07 |
| FVC | 3.5922 – 0.01532a + 0.05207h | 4.80 | ||||
| South Asian (2007) | Pakistan | 321 | 183 | FEV1 | 1.440 – 0.020a + 0.030h | 3.06 |
| 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.