A psychometric evaluation of the Diabetes Symptom Checklist-Revised (DSC-R) cognitive distress, fatigue, hyperglycemia, and hypoglycemia subscales in patients with type 1 and type 2 diabetes

Figures & data

Table 1 Characteristics of study participants

Patients	Study 1 (N = 371)	Study 2 (N = 481)
	Type 2 diabetes	Type 1 diabetes
Mean Age (Years)	57	40
Male (%)	56	57
Caucasian (%)	62	65
HbA1c at screening	8.2 ± 1.1%	7.9 ± 1.2%

Abbreviation: HbA_1c, glycosylated hemoglobin.

Table 2 Reliability, statistics, and Pearson correlations for DSC-R subscales: cognitive distress, fatigue, hyperglycemia and hypoglycemia

		Study 1				Study 2
		Patients with type 2 diabetes N = 371				Patients with type 1 diabetes N = 481
		Cognitive distress	Fatigue	Hyperglycemia	Hypoglycemia	Cognitive distress	Fatigue	Hyperglycemia	Hypoglycemia
Reliability statistics	ICCa	0.76	0.72	0.68	0.73	0.72	0.74	0.62	0.66
	Crohnbach’s α	0.91	0.91	0.81	0.83	0.90	0.87	0.82	0.79
Pearson correlations	A1C	0.08	0.07	0.13d	0.04	0.07	0.11d	0.14e	0.12d
	Positive well-beingb	−0.32e	−0.39e	−0.14e	−0.31e	−0.37e	−0.38e	−0.15e	−0.33e
	Negative well-beingb	0.59e	0.58e	0.32e	0.59e	0.47e	0.46e	0.29e	0.50e
	Energyb	−0.54e	−0.71e	−0.32e	−0.52e	−0.40e	−0.61e	−0.24e	−0.39e
	Satisfactionc	−0.24e	−0.33e	−0.12d	−0.30e	−0.17e	−0.21e	−0.09	−0.16e

a Notes: ICC = Intraclass Correlation Coefficient. Single Measure Consistency;

b Well-Being Questionnaire-12¹⁰;

c Diabetes Satisfaction Questionnaire¹¹;

d P ≤ 0.05 (2-tailed);

e P ≤ 0.01 (2-tailed).

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