s**   **Variables**   **Frequency (%) of study participation response**   **Risk estimates (00% CI)**                                                ----------------------------------- --------------- --------------------------------------------------- ----------------------------- ------------ --------------- ------------ ------------   Age (years)                         00--00          00 (00.0)                                           00 (00.0)                     000 (00.0)   −00.0\          0.0\         0.0\                                                                                                                                                      (−00.0,0.0)     (0.0--0.0)   (0.0--0.0)                                        00--00          00 (00.0)                                           00 (00.0)                     00 (00.0)                                                                         Total           000 (000)                                           00 (000)                      000 (000)                                     Males more 