“…Two articles in this issue of JCSM address position modifi cation treatment of positional OSA. De Vries et al 1 examined shortand long-term compliance, defi ned as 3 and 6 months, respectively, in patients using either a sleep position trainer (SPT) or tennis ball technique (TBT). Eijsvogel et al 2 focused on shortterm (1 month) compliance rates in patients using SPT versus TBT.…”