The Sleep Quality Scale: Percentile Norms, Sleep Disturbances and Effects of Sleep Quality on Depressive Symptoms and Worry

Pages: 146-151
Arun Kumar Jaiswal and Anju Singh (Department of Psychology, Faculty of Social Sciences, Mahatma Gandhi Kashi Vidyapith, Varanasi, Uttar Pradesh)

The present study reports the percentile norms for the Sleep Quality Scale to differentiate between good sleep from various degrees of severity of sleep disturbances and its effects on depressive symptoms and worry. The sample consisted of 20 to 67 years old 200 participants from Varanasi city of Uttar Pradesh and they were individually administered Sleep Quality Scale, BDI-II and Pennsylvania Sate Worry Questionnaire. On the basis of 25th, 50th and 75th percentiles, the participants were categorized into four groups of (i) Good sleep, (ii) Mild sleep disturbance, (iii) Moderate sleep disturbance, and (iv) Severe sleep disturbance. The mean sleep quality values of the four groups showed sleep disturbance in an increasing order. No significant gender and age differences appeared in sleep quality of four groups. The participants with various degrees of poor sleep quality displayed significantly increasing levels of depressive symptoms and worry in comparison to participants with good sleep. The significant interaction effects of ‘groups of sleep quality X gender’ on depressive symptoms revealed that severe sleep disturbance had significantly more effects on depressive symptoms in women than in men.