TABLE 4

Results of Student-Newman-Keuls Test of Repeated Measurement Studies for Diatrizoate Meglumine and Iohexol

Group	Day 1*^†	Day 8*^†	Day 15*^†	Day 22*^†
A	Control	Control	Control	Control
			Diatrizoate meglumine, 282 mg I/kg Diatrizoate meglumine, 564 mg I/kg	Diatrizoate meglumine, 282 mg I/kg Diatrizoate meglumine, 564 mg I/kg
			Iohexol, 300 mg I/kg	Iohexol, 300 mg I/kg
				Iohexol, 600 mg I/kg
B	Diatrizoate meglumine, 282 mg I/kg	Diatrizoate meglumine, 282 mg I/kg	Iohexol, 600 mg I/kg
		Diatrizoate meglumine, 564 mg I/kg
C	Diatrizoate meglumine, 564 mg I/kg	Iohexol, 300 mg I/kg Iohexol, 600 mg I/kg
D	Iohexol, 300 mg I/kg
	Iohexol, 600 mg I/kg

↵* Radioiodide administered 24 h before determination of thyroid uptake.
↵^† Time after termination of administration of interfering agent.
Student-Newman-Keuls test controls type I experiment-wise error rate (α = 0.05) under complete null hypothesis but not under partial null hypotheses.