Table 7.

Height z-Scores of Patients Stratified by Type of Drugs at Different Times from Enrolment

	MPH n	Mean±SD	ATX n	Mean±SD	MPH vs ATX t testa
0 months	288	0.35±1.19	286	0.32±1.27
6 months		0.35±1.16		0.27±1.20
0 vs 6 mo. t testb		t287=0.05		t285=1.68	t572=1.23
		p<0.961		p<0.093	p=0.220
0 months	167	0.37±1.22	139	0.55±1.21
12 months		0.27±1.19		0.32±1.16
0 vs 12 mo. t testb		t166=3.54		t138=6.77	t304=2.79
		p<0.001		p<0.001	p=0.006
0 months	55	0.36±1.21	35	0.84±1.22
24 months		0.18±1.12		0.40±1.30
0 vs 24 mo. t testb		t54=1.96		t34=3.55	t88=1.27
		p<0.055		p<0.001	p=0.203

^aUnpaired Student's t test: Comparisons between MPH and ATX-treated subjects regarding weight changes between baseline and the end of the specific reference period.

^bPaired Student's t test: Comparisons between measurements taken at baseline and at the end of the specific reference period, within each treatment group.

MPH, methylphenidate; ATX, atomoxetine; df, degrees of freedom.