Fig. 1

The moderating effect of depression on the relationship between IAS scores and sleep-problem scale scores. a The effect of Young scores on the sleep-wake behavior problem scale scores with and without the moderating effect of depression. b The effect of Young scores on the Insomnia severity index scores with and without the moderating effect of depression. c The effect of Young scores on the Epworth sleepiness scale scores with and without the moderating effect of depression