Table 7.

 Pooled estimates of SCC specific outcomes after adjuvant radiotherapy

	Proportion (95% CI) of patients, I2, No of patients
	Local recurrence	Regional recurrence	Distant metastases	Patient died from disease
Adjuvant radiotherapy for perineural invasion71-75	18.2% (3.8% to 39.8%), 37%, n=22	8.3% (1.1% to 21.4%), 0%, n=22	11.5 (2.4% to 26.1%), 1%, n=22	11.1% (0.4% to 33.1%), 45%, n=20
Adjuvant radiotherapy for other types of SCC20,76-78	11.1% (2.4% to 25.0%), 35%, n=47	8.5% (2.5% to 17.6%), 0%, n=47	3.2% (0.1% to 10.4%), 9%, n=47	13.9% (0.05% to 50.2%), 74%, n=21