BMC Medical Research Methodology

Table 2 Pearson correlation coefficients for OGTT measurements, FPC scores and simple summary measures ( n =974)

From: Shape information from glucose curves: Functional data analysis compared with traditional summary measures

OGTT	OGTT					FPC scores
	Fasting	30 min	60 min	90 min	2 h	FPC1: “General level”	FPC2: “Time to peak”	FPC3: “Oscillation”
Fasting	1.00	0.44	0.40	0.41	0.42	0.47	−0.12	0.42
30 min		1.00	0.77	0.66	0.55	0.85	−0.47	0.19
60 min			1.00	0.84	0.70	0.96	−0.04	−0.22
90 min				1.00	0.80	0.93	0.31	−0.01
2 h					1.00	0.79	0.40	0.37
AUC	0.50	0.86	0.95	0.92	0.81	0.999	−0.01	0.05
Simple shape index^a	−0.10	−0.34	−0.49	−0.41	0.12	−0.42	0.21	0.67

^a n=711. Calculated as 2-h value minus 90-min value, or 90-min minus 60-min value [12].

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