Daily self-injecting of insulin and frequent self-monitoring of blood glucose (SMBG) are essential to adequately manage insulin-requiring diabetes. Extreme fear of self-injecting (FSI) insulin (injection phobia) is likely to compromise glycemic control as well as emotional wellbeing. Likewise, fear of SMBG (finger prick) can be a source of distress and may seriously hamper self-management. There is evidence to suggest that fear of blood and injury is associated with less frequent self-testing (1,2) and poor glycemic control (2). However, research concerning the etiology, prevalence, and treatment of FSI and fear of selftesting (FST) in patients with diabetes is scarce. To date, only a few studies, mostly case reports, have been published on the subject of FSI (3-8), and no research is known to us on FST.To quantify the level of FSI as well as FST in adults with insulin-requiring diabetes, we developed a diabetes-specific questionnaire, the Diabetes Fear of Injecting and Self-Testing Questionnaire (D-FISQ), which consists of 2 subscales, FSI and FST (9,10). Subscale scores and a total score are obtained. Preliminary results suggested satisfactory psychometric properties. In the present study, stability of the D-FISQ was assessed over different periods of time, and construct, discriminant, and convergent validity were examined. Criterion-related validity was tested by means of a behavioral avoidance test (BAT), in which the actual self-injecting and self-testing behaviors of extreme scorers on the D-FISQ were examined. Moreover, we investigated the latent factor analytic structure of the D-FISQ.
RESEARCH DESIGN AND METHODSStudy subjects and procedure Reliability: internal consistency and testretest reliability. A composite questionnaire including the D-FISQ was sent to a random sample of 3,000 patients (with type 1 or 2 diabetes) drawn from ϳ40,000 members of the Dutch Diabetes Association (DVN, Diabetesvereniging Nederland). Inclusion criteria were 1) age Ͼ16 years and 2) being on insulin therapy for a minimum of 6 months. The latter criterion was chosen because we were interested in FSI/FST that persists beyond the early adaptation period. In total, 1,484 questionnaires were returned (49.5%); 12 questionnaires were excluded from data analyses because they were not complete. After exclusion of subjects not using insulin (n = 197), 1,275 subjects remained, from which a group of 252 subjects (sample A) was randomly selected. In this sample, internal consistency was assessed, as well as several aspects of validity. A second set of questionnaires, once more including the D-FISQ, was sent to this sample after ϳ3 months to determine test-retest reliability of the D-FISQ. RESULTS -Test-retest correlations ranged from 0.50 to 0.68 (P Ͻ 0.001). Correlations between D-FISQ and fear of hypoglycemia, trait anxiety, and fear of bodily injury, illness, or death ranged from 0.28 to 0.45 (P Ͻ 0.001). Patients who refused to do a BAT for self-injecting or self-testing had higher scores on FSI (P = 0.095) and FST (P = 0.01). EFA y...