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Sick and Tired: Understanding and Managing Sleep Difficulties in ...

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a questionnaire explor<strong>in</strong>g perceived sleep quality, pa<strong>in</strong> severity, depression <strong>and</strong> physical<br />

disability, after controll<strong>in</strong>g for pa<strong>in</strong> <strong>and</strong> depression, sleep disturbance expla<strong>in</strong>ed 29% of<br />

the variance <strong>in</strong> physical disability, 58% of psychosocial disability, <strong>and</strong> 31% of physical<br />

symptoms. In addition, Stone, Broderick, Porter, & Kaell (1997) revealed that<br />

perceptions of pa<strong>in</strong> were significantly correlated with perceptions of sleep quality<br />

recorded, us<strong>in</strong>g an electronic sleep diary over one week <strong>in</strong> participants with rheumatoid<br />

arthritis. A similar f<strong>in</strong>d<strong>in</strong>g has also been revealed <strong>in</strong> patients with acute pa<strong>in</strong> after a burn<br />

<strong>in</strong>jury (Raymond, Nielsen, Lavigne, Manz<strong>in</strong>i, & Cho<strong>in</strong>iere, 2001). Significant<br />

associations have also been found between perceptions of pa<strong>in</strong> severity <strong>and</strong> objective<br />

measures of sleep quality (Wilson et al., 1998). These f<strong>in</strong>d<strong>in</strong>g suggest that despite the<br />

use of different measures, sleep quality has a consistent <strong>in</strong>dependent effect on health<br />

outcomes <strong>in</strong> chronic pa<strong>in</strong> conditions.<br />

Nature of <strong>Sleep</strong> Disturbance <strong>in</strong> Chronic Pa<strong>in</strong><br />

Explor<strong>in</strong>g the types of sleep difficulties that people with chronic pa<strong>in</strong> conditions<br />

experience, Smith et al (2000) asked 51 participants receiv<strong>in</strong>g treatment for a variety of<br />

chronic pa<strong>in</strong> conditions to complete the PSQI (described above), ask<strong>in</strong>g about their<br />

perceived sleep quality over the previous month. It was revealed that participants slept<br />

on average six hours per night, with a mean sleep onset latency of 48 m<strong>in</strong>utes (<strong>in</strong><br />

comparison to 7-8.5 hours sleep per night <strong>and</strong> sleep onset latency of

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