Table 1– Examples of predicted values in males and females across the age range studied

Age yrs	Height cm	Sex	Predicted FEV₁ L	FEV₁ LLN L	FEV₁ LLN% pred
3	99	Male	0.79	0.58	73.4
5	115	Female	1.17	0.89	76.1
7	122	Male	1.45	1.14	78.6
11	133	Male	1.80	1.45	80.6
15	150	Male	2.71	2.20	81.2
20	159	Female	3.12	2.52	80.8
25	170	Female	3.61	2.92	80.9
30	186	Female	4.32	3.49	80.8
40	162	Male	3.38	2.71	80.2
50	175	Male	3.79	2.97	78.4
60	183	Male	3.85	2.93	76.1
70	172	Female	2.52	1.92	76.2
80	169	Male	2.55	1.81	71.0

These data are presented as an example and should not be used to define abnormal results in individual patients. FEV₁: forced expiratory volume in 1 s; LLN: lower limit of normal.