Characteristics and predicted outcome of patients lost to follow-up after degenerative lumbar spine surgery.
Catharina ParaiO HäggC WillersB LindH BrisbyPublished in: European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society (2020)
Attrition in Swespine cannot be ignored, as non-respondents were predicted to have worse outcome. The effect of attrition bias should always be considered when contemplating outcome recorded in a quality register with patients lost to follow-up.