9. accidental falls/ or accidents/ or exp accident prevention/ or accidents, home/ or accident proneness/
10. (fall or falls or faller or fallen or fallers or falling or fall-related or near-fall or falls-efficacy scale).tw.
11. (slip or slips or slipped or slipping or trip or trips or tripped or tripping).tw.
12. (stumble$ or tumble$).tw
13. (lose adj5 footing).tw.
14. 9 or 10 or 11 or 12 or 13
15. 8 and 14
16. Randomized Controlled Trials as Topic/
17. random allocation/
18. Controlled Clinical Trials as Topic/
19. control groups/