. 2014 Aug 1;16(8):519–523. doi: 10.1089/dia.2013.0356

Table 1.

Pearson Correlation, Intraclass Coefficient, and Root Mean Square Error for Actual and Predicted Glycosylated Hemoglobin Values

Pearson correlations^a	BOLUS	BGM	A1c0	A1c3	A1c6	A1c9	A1c12	Female	Base age
BOLUS	1	0.589^*	−0.564^*	−0.578^*	−0.571^*	−0.562^*	−0.541^*	0.003	−0.383^*
BGM	0.589^*	1	−0.391^*	−0.519^*	−0.504^*	−0.512^*	−0.397^*	−0.030	−0.501^*
Female	0.003	−0.030	0.020	−0.001	−0.012	−0.033	0.008	1	0.019
Base age	−0.383^*	−0.501^*	0.282^*	0.343^*	0.308^*	0.333^*	0.300^*	0.019	1
ICC^b
BOLUS			0.657^*	0.667^*	0.679^*	0.677^*	0.657^*
BGM			0.437^*	0.527^*	0.536^*	0.550^*	0.463^*
RMSE^c
BOLUS^d				1.58^*	1.46^*	1.49^*	1.56^*
95% CI BOLUS^e				0–11.5	0–9.8	0–9.5	0–10.3
BGM^d				1.69^*	1.55^*	1.55^*	1.68^*
95% CI BGM^e				0–12.6	0–10.6	0–11.2	0–12.2

Unless indicated otherwise, P>0.05 for all comparisons.

^{^a}

Correlations including four quarters of glycosylated hemoglobin (HbA1c) values post-baseline.

^{^b}

Intraclass correlation coefficients (ICCs) of predicted HbA1c values of Eqs. 1 and 2 with future HbA1c values.

^{^c}

Root mean squared error of predicted HbA1c values of Eqs. 1 and 2 to actual HbA1c values of quarters 3–12.

^{^d}

Root mean square errors (RMSEs) of mealtime insulin bolusing (BOLUS) are statistically significantly lower than RMSEs of blood glucose monitoring (BGM) (P<0.015).

^{^e}

95% confidence intervals (CIs) of RMSEs of adherence measures.

^{^*}

P<0.01.

A1c3, A1c6, A1c9, and A1c12, mean HbA1c at 3, 6, 9, and 12 months, respectively, post-baseline; Base age, baseline age of youths.