Table 2: Background characteristics of adolescents with diabetes in study 2.

Background dataGirls Boys

Age mean (SD)14.3 (1.2)15.4 (1.3)
Ethnicity: native Dutch, nonmigrant6 (100%)5 (100%)

Educational level
 Secondary school (vocational level)2 (33%)
 Secondary school (precollege level)4 (67%)3 (60%)
 Postsecondary education (vocational)1 (20%)
 Not reported1 (20%)

Parental educational level
 Secondary school1 (17%)2 (40%)
 Postsecondary education (vocational)1 (17%)1 (20%)
 College/university4 (67%)1 (20%)
 Not reported1 (20%)

Time since diagnosis
 1–5 years2 (33%)2 (40%)
 5–10 years2 (33%)2 (40%)
 >10 years2 (33%)1 (20%)

Insulin administration
 Pump1 (17%)2 (40%)
 Injection5 (83%)3 (60%)

Last HbA1c level
 <7.52 (33%)3 (60%)
 7.5–9.03 (50%)1 (20%)
 >9.01 (20%)
 Not reported1 (17%)

Social support attitude
 Type A (low friend involvement)2 (33%)3 (60%)
 Type B 4 (67%)2 (40%)

Friendship duration
 1-2 years1 (17%)
 2–5 years2 (33%)2 (40%)
 5–10 years2 (33%)1 (20%)
 >10 years1 (17%)2 (40%)