There was a highly significant sex difference in the incidence of complications; for males the complication incidence was 6.3% (seven of 111 patients), whereas for females the complication incidence was 23.3% (21 of 90 patients), P = 0.0005.
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The sentences
We found a lower incidence of complications using the single tapered dilator methods for tracheostomy insertion, as opposed to Griggs' forceps or sequential dilators, although differences did not reach statistical significance.