British Journal of Ophthalmology · 1973 · 10 citations · 0 references
MedicineOphthalmologySurgeryOcular DiseaseOcular PathologyOphthalmic SurgeryDiabetic RetinopathyRetinal DetachmentRetinal PathologyRetinal SurgeryVitreoretinal SurgeryVitreous SurgeryOcular Manifestations Of DiabetesProliferative Vitreoretinopathy SurgeryVitreous Anatomy
SIR, The reason why a statistical analysis was not given is that it is not known if the disease existed in comparable severity in the treated and untreated cases; many of the local and general factors influencing the prognosis are still unknown.It is for this reason that the word controls was put in inverted commas.