“…The reference population here consisted of 382 (44%) patients who completed the EORTC QLQ‐C30 questionnaire a median of two 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 years after their diagnosis. The two groups did not differ in age, sex, alcohol or by aetiology but the reference population had a shorter disease duration ( p < 0.001) and more smoking ( p = 0.029).…”