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Table 1 Frequencies, means, and standard deviations among sleep variables

From: Is purpose in life associated with less sleep disturbance in older adults?

  Baseline n = 825 1-year Follow-Up n = 825 2-year Follow-Up n = 554 3-year Follow-Up n = 247
  Mean (SD)/N(%) Range Mean (SD)/N(%) Range Mean (SD)/N(%) Range Mean (SD)/N(%) Range
Sleep Quality Total Score 5.93 (2.81) 0–15 5.92 (2.89) 0–14 5.86 (2.91) 0–14 5.94 (2.91) 0–15
High Sleep Apnea Risk 346 (41.9%)   341 (41.3%)   225 (27.3%)   100 (12.1%)  
High Restless Leg Syndrome Risk 195 (23.6%)   189 (22.9%)   137 (16.6%)   48 (5.8%)  
High REM Behavior Disorder Risk 58 (7.0%)   60 (7.3%)   41 (5.0%)   28 (3.4%)