Measurement of HbA1c in multicentre diabetes trials – should blood samples be tested locally or sent to a central laboratory: an agreement analysis

Table 1 Sample characteristics

	All children randomised		Children with at least one valid pair of measurements
	N	Summary statistics	n	Summary statistics
Available sample size	294		255
Males: n (%)	292	153 (52.4 %)	254	131 (51.6 %)
Age: mean (SD)	292	9.0 (4.1)	254	8.9 (4.1)
Participating centres		15		15
Number of follow-up appointments attended:	294	-	255	2 (1,3)^a
Total	294	1371	255	590^a
Median (IQR) per child	294	5(4,5)	255	2 (1,3)^a

^aTime points where a valid pair of measurements were available. IQR interquartile range, SD standard deviation

ISSN: 1745-6215