Causes and Clinical Impact of Loss to Follow-Up in Patients with Proliferative Diabetic Retinopathy

Table 2

Interventions used for treating proliferative diabetic retinopathy in patients lost to follow-up after resuming care until the end of the observation period.

PDR treatment	Number of patients LTFU	Duration of resumed follow-up to final visit (months)	Duration of resumed follow-up to final visit (months)	Duration of resumed follow-up to final visit (months)	Duration of resumed follow-up to final visit (months)
		PRP	IVI (s)	PPV
IVI	8	4	5	2	7.3 ± 2.5
PRP	23	12	9	3	4.1 ± 1.7
PRP + IVI (s)	45	19	32	9	7.8 ± 1.1

IVI = intravitreal injection, LTFU = loss to follow-up, PRP = panretinal photocoagulation, PPV = pars plana vitrectomy, and PDR = proliferative diabetic retinopathy.