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

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<strong>and</strong> time away from daily life to complete the <strong>in</strong>tervention, PMR <strong>in</strong> itself may have<br />

therapeutic benefits. It would have been useful to have <strong>in</strong>cluded a third group of<br />

participants who received usual care <strong>in</strong> this study, to enable the exploration of effects of<br />

the m<strong>in</strong>dfulness <strong>and</strong> PMR <strong>in</strong> comparison to a group receiv<strong>in</strong>g no <strong>in</strong>tervention <strong>and</strong> thus<br />

to <strong>in</strong>crease underst<strong>and</strong><strong>in</strong>g of the therapeutic benefits of the <strong>in</strong>terventions. The f<strong>in</strong>d<strong>in</strong>gs<br />

of this study may also have been limited, as the compliance with completion of the<br />

<strong>in</strong>tervention could not be reliably explored <strong>in</strong> this study, <strong>and</strong> it unclear if participants<br />

completed the full <strong>in</strong>tervention on all occasions. Indeed as previously described, some<br />

participants <strong>in</strong> the PMR group provided <strong>in</strong>formal feedback that they discont<strong>in</strong>ued the<br />

<strong>in</strong>tervention due to an <strong>in</strong>crease <strong>in</strong> their FMS symptoms, <strong>and</strong> some m<strong>in</strong>dfulness group<br />

participants reported cont<strong>in</strong>u<strong>in</strong>g the <strong>in</strong>tervention <strong>in</strong> week three (when they had been<br />

asked to discont<strong>in</strong>ue the <strong>in</strong>tervention) because they had found it to be of benefit. This<br />

<strong>in</strong>formal feedback was useful when <strong>in</strong>terpret<strong>in</strong>g the results of a feasibility study, <strong>and</strong> the<br />

study would have been strengthened by record<strong>in</strong>g this feedback <strong>in</strong> a more st<strong>and</strong>ardised<br />

format, such as through a qualitative <strong>in</strong>terview on completion of the study. An <strong>in</strong>terview<br />

would have enabled further exploration of participants‟ experiences of the two<br />

<strong>in</strong>terventions to <strong>in</strong>form <strong>in</strong>terpretation of the f<strong>in</strong>d<strong>in</strong>gs <strong>and</strong> further research.<br />

A key strength of this study is that no participants were lost to follow up or withdrew<br />

from the study after r<strong>and</strong>omisation (although the attrition rates may have been due<br />

partly to the short <strong>in</strong>tervention duration <strong>and</strong> follow up). Previous studies have<br />

highlighted high attrition rates, with between 21- 39% of participants fail<strong>in</strong>g to<br />

complete the full <strong>in</strong>tervention program due to schedul<strong>in</strong>g conflicts, difficulties arrang<strong>in</strong>g<br />

childcare, work commitments, lack of <strong>in</strong>terest <strong>and</strong> older age (Ast<strong>in</strong> et al., 2003; Kaplan<br />

et al., 1993; Lush et al., 2009). This <strong>in</strong>tervention was designed to address these<br />

accessibiliy issues <strong>and</strong> revealed that these issues can be overcome by tailor<strong>in</strong>g the<br />

<strong>in</strong>terventions to the needs of the specific population. However, a limitation of this study<br />

was that six (16%) participants were unable to tolerate wear<strong>in</strong>g the actiwatch due to sk<strong>in</strong><br />

sensitivity <strong>and</strong> this will have reduced the ability of the study to detect <strong>and</strong> change<br />

between the two groups on the objective measures. Participants experienc<strong>in</strong>g discomfort<br />

were advised to wash their actigraph strap several times to loosen the material <strong>and</strong> to<br />

ease discomfort as advised by the manufactur<strong>in</strong>g company, although this did not appear<br />

to resolve the problem for these participants. Modifications to the straps of the<br />

actigraphs may therefore be required for future research studies with this population.<br />

147

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