. 2019 Aug 19;19:225. doi: 10.1186/s12877-019-1248-2

Table 10.

Spearman’s rank correlation coefficient between the AIS, ESS, and ISI results and the respondents’ age

	60–70 years						71–80 years						81–90 years
	AIS		ESS		ISI		AIS		ESS		ISI		AIS		ESS		ISI
	r_s	p	r_s	p	r_s	p	r_s	p	r_s	p	r_s	p	r_s	p	r_s	p	r_s	p
AIS	–	–	0.204	0.044*	0.799	< 0.001*	–	–	0.341	0.003*	0.812	< 0.001*	–	–	0.285	0.425	0.752	0.012*
ESS	0.204	0.044*	–	–	0.310	0.002*	0.341	0.003*	–	–	0.376	0.001*	0.285	0.425	–	–	0.143	0.693
ISI	0.799	< 0.001*	0.310	0.002*	–	–	0.812	< 0.001*	0.376	0.001*	–	–	0.752	0.012*	0.143	0.693	–	–

Abbreviations: AIS Athens Insomnia Scale, ESS Epworth Sleepiness Scale, ISI Insomnia Severity Index, r_s Spearman’s rank correlation coefficient, p p-value, * statistically significant value