Effectiveness of adjuvant radiotherapy in patients with oropharyngeal and floor of mouth squamous cell carcinoma and concomitant histological verification of singular ipsilateral cervical lymph node metastasis (pN1-state) - A prospective multicenter randomized controlled clinical trial using a comprehensive cohort design

Table 1 Time Schedule

Start	-> Start of recruitment phase (presumably Sep. 2009)
End of year 1	-> Intermediate assessment of recruitment level:
	- If fraction of randomized patients <5% of total count: ongoing recruitment, else abortion of randomization
End of year 2	-> Second intermediate assessment of recruitment level:
	- If fraction of randomized patients <10% of total count: ongoing recruitment, else abortion of randomization
End of year 4	-> End of recruitment phase
	-
Year 5+6	-> Follow-up
Year 7+8
Year 9
End of year 9	-> End of Follow-Up
	-> Final analysis of the primary clinical endpoint: Evaluation of the overall-survival

ISSN: 1745-6215