e21520 Background: Elderly patients (pts) are underrepresented in clinical trials in gynecological cancer, even though they are disproportionally often affected. This study aimed to evaluate disposition and apprehension of elderly pts towards study participation. Methods: 112 elderly gynecological cancer pts (median age 70; range 65-92) were surveyed in a multicenter cross-sectional study. Besides fitness, state of disease, education and domestic situation, questions aimed at the general willingness to participate in a clinical trial. Personal reasons for rejection and suspected advantages/disadvantages that might evolve from participation were inquired. Results: Willingness to participate in a study was generally high (66.1%, 74/112). 42/112 (37.5%) had given their consent to participation in a study before, 12.5% (6/48) refused even though they were offered participation. Reasons for potential study participation were: ‘better monitoring of the disease’ (51/112), ‘better medical care’ (35/112), ‘to help medical research’ (31/112), ‘better medication’ (27/112) and ‘because of my doctor’s recommendation’ (17/112). Reasons for potential refusal were: ‘too time consuming’ (19/112), ‘fear of side effects’ (17/112), ‘misuse as experimental animal’ (14/112), ‘long distance to clinic’ (11/112) and ‘too little or unclear information’ (7/112). 26.1% (29/112) of pts stated, that they had ‘no objection’ against study participation. The question if pts anticipated having a longer life due to study participation was answered with ‘yes’ or ‘rather yes’ in 33.9% (38/112), 23.2% answered ‘no’ or ‘rather no’ (23.2% undecided). No relation between willingness to participate in a study and general fitness (p = 0.311), education (p = 0.631) or domestic situation (p = 0.195) could be observed. However, with increasing age, willingness decreased (p = 0.029). Conclusions: Elderly pts are generally willing to participate in clinical studies regardless of their fitness or educational background. Benefits of participation seem to be unclear among a majority of potential study participants. Therefore it might be decisive to provide more general information regarding benefits and safety for the elderly pts in a clinical trial.