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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 4. Hazard of an ICD-9 coded Attention Deficit Hyperactivity Disorder Diagnosis after a Single Exposure to Surgery and Anesthesia in TX and NY.

Figure 4

Hazard ratios (HR) for diagnosis of an attention deficit hyperactivity disorder 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.