Establishment of Reference Norms for Lung Function Parameters of Healthy Sri Lankan Tamils
Table 6
Reference equations lung function parameters based on age & height.
Parameter
Males
Females
Equation
SEE
Adj.
Equation
SEE
Adj.
14–20 years
VC (L)
0.051H + 0.091age − 6.565
0.451
0.579
0.036H + 3.153
0.340
0.277
FVC (L)
0.054H + 0.108age − 7.363
0.448
0.126
0.039H + 0.021age − 3.864
0.342
0.317
FEV1 (L)
0.041H + 0.1age − 5.486
0.417
0.559
0.034H + 2.964
0.304
0.299
PEFR (L/min)
3.847H + 15.76age − 493.558
59.007
0.455
2.577H + 87.954
49.33
0.090
>20 years
VC (L)
0.046H + 0.018age − 3.677
0.469
0.453
0.033H + 0.015age − 2.234
0.365
0.396
FVC (L)
0.046H + 0.022age − 3.311
0.469
0.481
0.033H + 0.018age − 1.985
0.364
0.436
FEV1 (L)
0.036H + 0.021age − 2.192
0.398
0.485
0.026H + 0.018age − 1.186
0.306
0.469
PEFR (L/min)
4.28H + 1.023age − 220.293
71.489
0.185
2.34H + 1.252age + 1.128
47.32
0.186
H-height in cm. As height can not be measured accurately in people who have spinal disorders, another set of equations based on arm span and age also were derived (Table 7).
