@article {Ting921, author = {Darren Shu Jeng Ting and Yu-Chi Liu and Moushmi Patil and Angel Jung Se Ji and Xiao Ling Fang and Yih Chung Tham and Yi-Fang Lee and Hla M Htoon and Jodhbir S. Mehta}, title = {Proposal and validation of a new grading system for pterygium (SLIT2)}, volume = {105}, number = {7}, pages = {921--924}, year = {2021}, doi = {10.1136/bjophthalmol-2020-315831}, publisher = {BMJ Publishing Group Ltd}, abstract = {Background/aims To propose and validate a new pterygium grading system based on slit-lamp evaluation.Methods This prospective cross-sectional study included 217 patients with pterygium. All patients underwent slit-lamp examination, and slit-lamp photographs were independently graded by two graders twice. A total of eight parameters were evaluated and all parameters were assigned with a score of 1{\textendash}4 (normal{\textendash}severe). Intra-rater and inter-rater reliability as determined by weighted Cohen{\textquoteright}s kappa analysis.Results A total of 868 independent assessment, based on 217 slit-lamp images, were performed by two graders. For conjunctival assessment, the intra-rater reliability was excellent for body thickness (κ=0.81{\textendash}0.89) and size at limbus (κ=0.87{\textendash}0.92), substantial-to-excellent for body vascularity (κ=0.72{\textendash}0.86), and moderate-to-excellent for body length (κ=0.57{\textendash}0.81), whereas the inter-rater reliability was excellent for size at limbus (κ=0.86), substantial for body thickness (κ=0.72{\textendash}0.73) and body vascularity (κ=0.66{\textendash}0.75), and moderate for body length (κ=0.54{\textendash}0.57). For corneal assessment, the intra-rater reliability was excellent for all four parameters (κ=0.84{\textendash}0.90) whereas the inter-rater reliability was excellent for head length (κ=0.86{\textendash}0.87), substantial-to-excellent for head vascularity (κ=0.78{\textendash}0.82), substantial for Stocker{\textquoteright}s line (κ=0.79{\textendash}0.80) and head thickness (κ=0.67{\textendash}0.69). The grading system was named SLIT2, which included S tocker{\textquoteright}s line, S ize at limbus, L ength of head/body, I njection/vascularity of body/head, and T hickness of body/head.Conclusion The proposed SLIT2 grading system, consisting of eight components, may serve as a reliable tool to standardise the reporting of pterygium severity and disease recurrence for clinical and research applications.}, issn = {0007-1161}, URL = {https://bjo.bmj.com/content/105/7/921}, eprint = {https://bjo.bmj.com/content/105/7/921.full.pdf}, journal = {British Journal of Ophthalmology} }