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. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: Anesth Analg. 2017 Dec;125(6):1988–1998. doi: 10.1213/ANE.0000000000002423

Figure 3. Hazard of an ICD-9 coded Developmental Delay Diagnosis after a Single Exposure to Surgery and Anesthesia in TX and NY.

Figure 3

Hazard ratios (HR) for diagnosis of a developmental delay are displayed for exposed vs. matched unexposed children. The number (n) of exposed children in each age at exposure group is also displayed. Panel A shows hazard ratios for children who had any of the four procedures of interest vs. unexposed children. Panels B, C, D, and E show hazard ratios for children who had pyloromyotomy, inguinal hernia repair, circumcision, and tonsillectomy and/or adenoidectomy respectively, compared to unexposed children.