Table 4—

Partial Pearson correlation coefficients (r_P) and regression equations for pulmonary function parameters with anthropometric data in adolescent males

	Subjects n	r_P	Regression	R²	p‐value
TLC
TVI	38	0.77	0.0006x+1.2	0.59	1×10⁻⁷
Height	38	0.70	0.12x–14.39	0.49	1×10⁻⁶
PST	38	0.65	0.89x+3.68	0.42	1×10⁻⁵
Age	38	0.59	0.41x–0.77	0.35	1×10⁻⁴
Weight	38	0.57	0.07x+1.63	0.32	2×10⁻⁴
VC
TVI	34	0.75	0.0006x+1.16	0.56	2×10⁻⁷
Height	40	0.65	0.08x–9.92	0.42	1×10⁻⁵
PST	39	0.63	0.65x+3.05	0.40	1×10⁻⁵
Weight	40	0.60	0.06x+1.2	0.36	5×10⁻⁵
Age	40	0.59	0.31x–0.31	0.35	1×10⁻⁴
FRC
TVI	34	0.66	0.0004x+0.36	0.44	2×10⁻⁵
Height	45	0.63	0.05x–5.49	0.40	6×10⁻⁴
Age	45	0.54	0.19x–0.53	0.29	2×10⁻⁴
Weight	45	0.48	0.03x+0.75	0.23	1×10⁻³
PST	45	0.48	0.35x+1.76	0.23	1×10⁻³
T_L,CO
PST	40	0.61	4.59x+14.96	0.37	3×10⁻⁵
Height	40	0.58	0.45x–52.68	0.34	1×10⁻⁴
Age	40	0.50	2.37x–12.48	0.25	1×10⁻³
Weight	40	0.49	0.34x+4.36	0.24	1×10⁻³
TVI	25	0.37	0.0023x+12.91	0.14	0.04
TVI
Height	40	0.68	110x–13143	0.46	2×10⁻⁶
Weight	40	0.58	72x+1382	0.34	1×10⁻⁴
Age	40	0.45	326x+648	0.20	3×10⁻³
RV/TLC
Age	38	0.07	0.20±0.04	0.01	0.69
T_L,CO/FRC
Age	35	0.07	10.02±2.29	0.01	0.69

When r_P is nonsignificant, mean±sd is given
TLC: total lung capacity (L)
VC: vital capacity (L)
FRC: functional residual capacity (L)
T_L,CO: lung transfer factor for carbon monoxide (mL·min⁻¹·mmHg⁻¹)
TVI: thoracic volume index (mL)
RV: residual volume (L)
PST: pubertal stage by Tanner scale