Table 4—

Logistic regression analysis of relating independent variables of progression ≥3 levels

Relative risk95% CIP
Age (years)1.00.85–1.170.99
Duration of diabetes (years)1.050.63–1.260.61
Mild moderate nonproliferative DR at entry/no DR3.30.32–34.90.32
HbA1c at entry (per %)1.10.4–2.90.81
HbA1c at 36 months (per %)1.90.90–4.170.09
IGF-1 at entry (per 10 units)0.90.74–1.180.58
IGF-1 at 36 months (per 10 units)1.61.09–2.310.02