Table 3.

Generalized linear model for z-score in Argentinian and German children with cerebral palsy according to different growth charts (n = 799).

Model	Anthropometric measurement	Variables	β	95%CI	p
(a) WHO charts, 2007
Main effect model	z-score BMI-for-age	Argentina, non-oral feeding, GMFCS IV and V	Reference
		Germany	0.041	− 0.22 to 0.30	0.048
		Oral Feeding	− 0.440	− 0.90 to 0.02	0.063
		GMFCS I to III	1.105	0.84 to 1.37	< 0.001
		Age	− 0.037	− 0.06 to − 0.01	0.007
Interaction effect model	z-score BMI-for-age	GMFCS IV and V *age	− 0.102	− 0.13 to − 0.07	< 0.001
Main effect model	z-score Height-for-age	Argentina, non-oral feeding, GMFCS IV and V	Reference
		Germany	0.852	0.62 to 1.08	< 0.001
		Oral Feeding	− 0.16	0.21 to − 0.57	0.451
		GMFCS I to III	1.338	1.10 to 1.58	< 0.001
		Age	− 0.061	− 0.08 to − 0.37	< 0.001
Interaction effect model	z-score Height-for-age	Germany*age	− 0.073	− 0.13 to − 0.10	0.006
		Argentina*age	− 0.144	− 0.18 to − 0.10	< 0.001
		GMFCS I to III*age	0.087	0.04 to 0.14	0.001
		Germany* GMFCS I to III	0.767	0.17 to 1.36	0.012
		Germany* GMFCS IV andV	0.233	− 0.34 to 0.81	0.428
		Argentina* GMFCS I to III	0.525	− 0.06 to 1.11	0.080
(b) US CP chart (2011)
Main effect model	z-score BMI-for-age	Argentina, non-oral feeding, GMFCS IV and V	Reference
		Germany	− 0.026	− 0.15 to 0.10	0.685
		Oral Feeding	− 0.306	− 0.53 to − 0.81	0.008
		GMFCS I to III	0.148	0.02 to 0.28	0.025
		Age	0.044	0.03 to 0.06	< 0.001
Interaction effect model	z-score BMI-for-age	Oral Feeding*age	0.042	0.03 to 0.05	< 0.001
		Non-Oral Feeding*age	0.062	0.04 to 0.08	< 0.001
Main effect model	z-score Height-for-age	Argentina, non-oral feeding, GMFCS IV and V	Reference
		Germany	0.321	0.21 to 0.44	< 0.001
		Oral Feeding	− 0.222	− 0.43 to − 0.02	0.034
		GMFCS I to III	0.096	− 0.02 to 0.21	0.116
		Age	− 0.050	− 0.06 to − 0.04	< 0.001
Interaction  effect model	z-score Height-for-age	Germany*age	− 0.032	− 0.05 to − 0.02	< 0.001
		Argentina*age	− 0.066	− 0.08 to − 0.05	< 0.001
Main effect model	z-score Weight-for-age	Argentina, non-oral feeding, GMFCS IV and V	Reference
		Germany	0.198	0.05 to 0.34	0.007
		Oral Feeding	− 0.429	− 0.69 to − 0.17	0.001
		GMFCS I to III	0.120	− 0.03 to 0.00	0.115
		age	− 0.013	0.85 to 1.04	0.089
Interaction effect model	z-score Weight-for-age	Germany*Oral feeding	− 0.261	− 0.57 to 0.04	0.095
		Argentina* Oral Feeding	− 0.553	− 0.86 to − 0.24	< 0.001

Significant differences are marked in bold.

GMFCS gross motor function classification system.