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Table 2 Clinical outcome following image-guided radiotherapy of the control group and the study group

From: Feasibility of image-guided radiotherapy based on helical tomotherapy to reduce contralateral parotid dose in head and neck cancer

  Study (23) Historical control (29)
Lost for follow-up 1 0
Follow-up (months)
    Median 20 31
    Range 1–39 1–48
    Alive 14 (63.6%) 21 (72.4%)
Local recurrences 5 (22.7%) 5 (17.2%)
Regional recurrences 2 (9%) 2 (6.9%)
Distant metastases 2 (9%) 4 (13.8%)
Death during treatment 2 (1 aspiration pneumonia, 1 disease progression) 0