Table 1.

Results of univariate regression between ∆HbA_1c and ∆QALY as well as ∆LE

	HbA1c coef.	Lower CI	Upper CI	P value	R 2
Studies using the CORE model
QALY (n = 98)	0.455	0.277	0.633	<0.001*	0.336
LE (n = 74)	0.808	0.503	1.113	<0.001*	0.687
Studies using other models
QALY (n = 21)	0.352	0.054	0.650	0.023*	0.293
LE (n = 14)	0.696	0.144	1.248	0.018*	0.306
Pooled
QALY (n = 119)	0.434	0.279	0.589	<0.001*	0.341
LE (n = 88)	0.794	0.500	1.088	<0.001*	0.656

CI confidence interval, HbA _1c glycosylated haemoglobin, LE life expectancy, QALY quality-adjusted life-year, coef. co-efficient

* Significant at 5% level