Table 3: Pulmonary function test prediction equations for rural females

Test, Units	Equations	R2	SEE
FVC, L	-1.562 + 0.044H† - 0.042A† (SRHS)	0.710	0.374
	-1.336 + 0.048H† - 0.040A† - 0.014W* (SRHS)	0.742	0.357
	0.944 + 0.039H† - 0.039A† - 0.022AB** (SRHS)	0.777	0.333
	-3.335 + 0.049 H - 0.024A [6]	0.660	0.427
	-3.590 + 0.0491H - 0.0216A [1]	0.740	0.393
FEV1, L	+0.493 + 0.026H** - 0.037A† (SRHS)	0.806	0.234
	+0.629 + 0.028H† - 0.036A† -0.009W* (SRHS)	0.825	0.225
	+1.833 + 0.023H** - 0.035A† - 0.012AB** (SRHS)	0.838	0.216
	-1.901 + 0.037H - 0.025A [6]	0.730	0.340
	-1.578 + 0.0342H - 0.0255A [1]	0.800	0.326
FEF25-75, L	+6.073** - 0.007H - 0.044A† (SRHS)	0.602	0.399
	+6.094** - 0.006H - 0.044A† + 0.001W (SRHS)	0.603	0.403
	+5.613* - 0.006H - 0.044A† + 0.004AB (SRHS)	0.605	0.402
	N/A
	+2.683 + 0.0154H - 0.0460A [1]	0.600	0.792
FEV1/FVC	+128.74† - 0.263H* - 0.126A** (SRHS)	0.281	3.123
	+127.81† - 0.279H** - 0.133A** + 0.059W (SRHS)	0.239	3.117
	+113.22† - 0.233H* - 0.142A** + 0.137AB* (SRHS)	0.317	2.954
	+ 104.509 - 0.089H - 0.182A [6]	0.200	5.680
	+126.58 - 0.2020H - 0.252A [1]	0.430	5.260

Abbreviations: FVC: Forced vital capacity, FEV₁: Forced Expiratory Volume in the First Second, FEF_25-75: Forced Expiratory Flow during the Middle Half of the Forced Vital Capacity, H: Height in cm, A: Age in years, W: Weight in Kg, AB: Abdominal Girth in cm, R²: Coefficient of determination, SEE: Standard Error of the Estimate, SRHS: Saskatchewan Rural Health Study, Statistically significant regression coefficients were indicated using * if p-value <0.05; ** if p-value <0.01; † if p-value <0.001.