Table 7.

Effect of duration of diabetes on progression of diabetic retinopathy in pregnancy

Study	Mean duration of Diabetes in years
DIEP[28]	>15 years – 50% progression to DR from baseline and 39% progression to PDR<15 years – 55% progression to DR from baseline and 18% progressed to PDR
Temple et al.[29]	10–19 years – 10% <10 years – 0%
Axer – Siegel et al.[4]	15.5±5.3 years – Progression 10.6±6.7 years – No progression
Makhwana et al.[27]	14±6.32 years - 4% overall progression