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Day workers suffering from a wider range of sleep problems are more likely to experience suicidality

View Article: PubMed Central - PubMed

ABSTRACT

Both a higher suicide rate and widespread sleep problems are serious health concerns in Japan when compared with those of other countries. We investigated the relationship between suicidal ideation and sleep problems in Japanese day workers using the 3-dimensional sleep scale (3DSS), which measures three sleep elements (phase, quality, and quantity). Data from 635 Japanese day workers (461 mens and 174 womens) were included. The 3DSS was used to assess participants’ sleep condition. Participants were classified into eight sleep types based on scores of phase, quality, and quantity: All Good Sleep, Owl (poor phase), Inefficient (poor quality), Short (poor quantity), Owl + Inefficient (poor phase and quality), Owl + Short (poor phase and quantity), Inefficient + Short (poor quality and quantity), and All Poor Sleep. We assessed participants’ suicidal ideation using question 19 of the self-rating depression scale (SDS); 119 cases (18.7 %) had ratings of 2–4 for this question and were considered to have suicidal ideation. The higher the number of sleep problems, the higher the risk of suicidal ideation compared to sleep types not indicative of problems. All Poor Sleep had the highest risk of the eight sleep types. Individuals with Owl + Short, Inefficient + Short, or All Poor Sleep had a significant risk of suicidal ideation even after adjusting for hopelessness and nightmares. Our findings suggested that sleep problems assessed by the 3DSS were related to suicidal ideation. Analysis of various aspects of sleep could be helpful for suicide prevention.

Electronic supplementary material: The online version of this article (doi:10.1007/s41105-016-0067-5) contains supplementary material, which is available to authorized users.

No MeSH data available.


Related in: MedlinePlus

Estimated value of 3DSS scores and multiple comparisons by ANCOVA (adjusted for age, gender, marital status, and company). Participants were classified into three groups based on SDS scores (under 39 = normal, 40–49 = slight depression, over 50 = moderate depression). There were significant differences (**p < 0.01; †p < 0.001, Bonferroni correction) for all comparisons of 3DSS scores
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Fig2: Estimated value of 3DSS scores and multiple comparisons by ANCOVA (adjusted for age, gender, marital status, and company). Participants were classified into three groups based on SDS scores (under 39 = normal, 40–49 = slight depression, over 50 = moderate depression). There were significant differences (**p < 0.01; †p < 0.001, Bonferroni correction) for all comparisons of 3DSS scores

Mentions: Figure 2 shows 3DSS scores of the normal, slight depression, and moderate depression groups based on SDS scores with an ANCOVA test. There were significant differences for all comparisons of 3DSS scores. The normal group had the highest 3DSS scores (phase, quality, and quantity) among the three groups, and the moderate depression group had the lowest.Fig. 2


Day workers suffering from a wider range of sleep problems are more likely to experience suicidality
Estimated value of 3DSS scores and multiple comparisons by ANCOVA (adjusted for age, gender, marital status, and company). Participants were classified into three groups based on SDS scores (under 39 = normal, 40–49 = slight depression, over 50 = moderate depression). There were significant differences (**p < 0.01; †p < 0.001, Bonferroni correction) for all comparisons of 3DSS scores
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037152&req=5

Fig2: Estimated value of 3DSS scores and multiple comparisons by ANCOVA (adjusted for age, gender, marital status, and company). Participants were classified into three groups based on SDS scores (under 39 = normal, 40–49 = slight depression, over 50 = moderate depression). There were significant differences (**p < 0.01; †p < 0.001, Bonferroni correction) for all comparisons of 3DSS scores
Mentions: Figure 2 shows 3DSS scores of the normal, slight depression, and moderate depression groups based on SDS scores with an ANCOVA test. There were significant differences for all comparisons of 3DSS scores. The normal group had the highest 3DSS scores (phase, quality, and quantity) among the three groups, and the moderate depression group had the lowest.Fig. 2

View Article: PubMed Central - PubMed

ABSTRACT

Both a higher suicide rate and widespread sleep problems are serious health concerns in Japan when compared with those of other countries. We investigated the relationship between suicidal ideation and sleep problems in Japanese day workers using the 3-dimensional sleep scale (3DSS), which measures three sleep elements (phase, quality, and quantity). Data from 635 Japanese day workers (461 mens and 174 womens) were included. The 3DSS was used to assess participants&rsquo; sleep condition. Participants were classified into eight sleep types based on scores of phase, quality, and quantity: All Good Sleep, Owl (poor phase), Inefficient (poor quality), Short (poor quantity), Owl&nbsp;+&nbsp;Inefficient (poor phase and quality), Owl&nbsp;+&nbsp;Short (poor phase and quantity), Inefficient&nbsp;+&nbsp;Short (poor quality and quantity), and All Poor Sleep. We assessed participants&rsquo; suicidal ideation using question 19 of the self-rating depression scale (SDS); 119 cases (18.7&nbsp;%) had ratings of 2&ndash;4 for this question and were considered to have suicidal ideation. The higher the number of sleep problems, the higher the risk of suicidal ideation compared to sleep types not indicative of problems. All Poor Sleep had the highest risk of the eight sleep types. Individuals with Owl&nbsp;+&nbsp;Short, Inefficient&nbsp;+&nbsp;Short, or All Poor Sleep had a significant risk of suicidal ideation even after adjusting for hopelessness and nightmares. Our findings suggested that sleep problems assessed by the 3DSS were related to suicidal ideation. Analysis of various aspects of sleep could be helpful for suicide prevention.

Electronic supplementary material: The online version of this article (doi:10.1007/s41105-016-0067-5) contains supplementary material, which is available to authorized users.

No MeSH data available.


Related in: MedlinePlus