Table III.

Results of the multiple regression analysis

Parameter	Age at time of diagnosisa		Type of CFTR mutationb		Infection by P. aeruginosa c
	β	p	β	p	β	p
Body height	–0.200	0.0623	–0.073	0.4910	–0.218	0.0041
Body weight	–0.042	0.6902	0.016	0.8824	–0.316	0.0032
BMI	0.085	0.4189	0.020	0.8024	–0.293	0.0060
Leg length	–0.443	< 0.0001	–0.152	0.1133	0.057	0.5471
Ratio of leg length to body height	–0.303	0.0048	–0.093	0.3702	0.013	0.8979
Trunk length	–0.421	< 0.0001	–0.150	0.1226	0.076	0.4315
Ratio of trunk length to body height	0.058	0.5988	0.025	0.8187	0.041	0.7114
Transverse chest width	0.119	0.2759	0.058	0.5889	–0.161	0.1346
Sagittal chest depth	–0.305	0.0037	–0.016	0.8738	0.207	0.0429
Chest index	–0.146	0.1688	0.064	0.5394	0.254	0.0167
Shoulder width	–0.357	0.0006	–0.134	0.1786	0.111	0.1346
Hip width	–0.381	0.0003	–0.122	0.2247	–0.003	0.9730
Hip to shoulder width index	–0.084	0.4440	0.006	0.9585	–0.177	0.1045
Triceps skinfold thickness	0.121	0.2466	–0.055	0.5919	–0.345	0.0011
Subscapular skinfold thickness	0.016	0.8829	–0.016	0.8794	–0.215	0.0473
Abdominal skinfold thickness	–0.109	0.2984	–0.219	0.0375	–0.237	0.0244
Sum of three skinfold thicknesses	0.072	0.5028	–0.143	0.1781	–0.280	0.0091
Upper arm circumference	–0.007	0.9424	–0.077	0.4526	–0.352	0.0009
Upper arm muscle circumference	0.041	0.6937	–0.074	0.4775	–0.296	0.0057
Percent of predicted FVC	–0.037	0.7383	–0.119	0.2945	–0.279	0.0142
Percent of predicted FEV1	–0.021	0.8475	–0.239	0.0028	–0.358	0.0012
Percent of predicted (FEF25–75)	–0.059	0.5999	–0.250	0.0302	–0.207	0.0689

^aAfter 3 years old, 3 month to 3 years old, immediately after birth

^bF508del/F508del, F508del/Mt, Mt/Mt

^cChronic infection, intermittent infection, no signs of infection.