Fig. 2.

Former SpO₂ ranges used in 156 European NICUs that changed their limits in the last 10 years. Results are expressed as n (%). For clarity, ranges reported by only one or two NICUs are not shown in the figure. Limits used in only one center are 80–87, 84–92, 84–94, 84–96, 85–88, 86–96, 87–95, 88–97, 88–98, 89–95, 89–97, 90–96, 91–100, 92–95, 92–97, 92–99, 93–97, 94–96, 94–98, 94–99, 95–98, 95–99, 92–97, 92–95, 90–100, and 91–100. Limits used in two centers are 80–95, 82–92, 85–94, 86–95, 86–90, 86–93, 86–94, 87–92, and 90–97