Table 1. Rates of orbital decompression by PCT considered in relation to their proximity to major centres.

Area	Population	Decompressions per 100 000/annum (median, range)
PCTs within 20 miles of five English hospitals with the highest annual decompression rates	24 489 308	4.35 (0.47–11.3)*
PCTs in the rest of England	26 215 681	2.93 (0.39-8.4)*

Abbreviation: PCT, primary care trust.

^*P<0.001.