Body weight, behaviours of concern, and social contact in adults and adolescents with Prader-Willi syndrome in full-time care services: Findings from pooled international archival data

Table 4 Factors influencing weight and BMI change over time

Predictor	Sum of squares	df	Mean square	F	p	Partial η²
Weight change	6.75	1	6.75	0.01	0.904	0.000
Weight change × Age	975.69	1	975.69	2.09	0.150	0.015
Weight change × Time in service	5409.36	1	5409.36	11.59	0.001	0.076
Weight change × Age × Time in service	3402.93	1	3402.93	7.292	0.008	0.050
Error	65329.63	140	466.64
BMI change	0.001	1	0.001	0.00	0.998	0.000
BMI change × Age	134.57	1	134.57	1.75	0.188	0.013
BMI change × Time in service	993.61	1	993.61	12.93	< 0.001	0.087
BMI change × Age × Time in service	536.30	1	536.30	6.98	0.009	0.049
Error	10451.68	136	76.85

Note: Mixed factorial ANCOVA results for overall changes in weight (n = 144) and BMI (n = 140) with possible influence of age at entry and number of years in service examined as covariates; Sum of squares, df, Mean square, and F refer to ANOVA test results; p = probability value used for statistical significance testing; Partial η2 = effect size statistic

ISSN: 1750-1172