Hi,

So I collected data on sleep positions for 5 nights. Each position (4 in total) were recorded as a percentage of total time asleep (e.g. 40% left, 30%, right, 20% back and 10% on stomach). Each participant then filled in a pain scale (from 0-10) to determine the level of back pain in the morning. My question is what is the best statistical test to see if there is a correlation between sleep positions and back pain scores? I'm doing my analysis on SPSS.

Any help would be greatly appreciated.

Thanks,

Roman