Pooled indices for the diagnostic efficacy of panoramic radiography (PR) for type I SRR: (A1) sensitivity, (B1) specificity, (C1) positive likelihood ratio, (D1) negative likelihood ratio; for type II SRR: (A2) sensitivity, (B2) specificity, (C2) positive likelihood ratio, (D2) negative likelihood ratio; for type III SRR: (A3) sensitivity, (B3) specificity, (C3) positive likelihood ratio, (D3) negative likelihood ratio; and for type IV SRR: (A4) sensitivity, (B4) specificity, (C4) positive likelihood ratio, (D4) negative likelihood ratio.