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. Author manuscript; available in PMC: 2015 May 1.

Published in final edited form as: Nurs Res. 2014 May-Jun;63(3):158–169. doi: 10.1097/NNR.0000000000000031

Table 4.

Correlations among Indices of the PSQI and the MAPS

Index	1	2	3	4	5	6	7	8	9	10	11	12
1. PSQI: Sleep Medication	1.00
2. PSQI: Sleep Quality	.10^*	1.00
3. PSQI: Sleep Latency	.04	.45^**	1.00
4. PSQI: Dysfunction	.12^*	.29^**	.18^**	1.00
5. PSQI: Sleep Efficiency	.06	.39^**	.34^**	.20^**	1.00
6. PSQI: Sleep Duration	−.01	.58^**	.44^**	.24^**	.64^**	1.00
7. PSQI: Sleep Disturbance	.11^*	.45^**	.33^**	.32^**	.33^**	.43^**	1.00
8. MAPS: Apnea Symptoms	.12^*	.18^**	.08	.20^**	.19^**	.20^**	.37^**	1.00
9. MAPS: Difficulty Sleeping	.15^*	.56^**	.54^**	.35^**	.45^**	.53^**	.57^**	.31^**	1.00
10. MAPS: Daytime Sleepiness	.09	.28^**	.18^**	.49^**	.22^**	.31^**	.27^**	.27^**	.43^**	1.00
11 MAPS: Narcolepsy Symptoms	.07	.27^**	.27^**	.27^**	.20^**	.29^**	.32^**	.28^**	.49^**	45^**	1.00
12. MAPS: Risk for Sleep Apnea	.10^*	.05	.08	.06	.07	.13^**	.24^**	.62^**	.12^*	.08	.07	1.00

Note. PSQI = Pittsburgh Sleep Quality Index. MAPS = Multivariable Apnea Prediction Score.

^*

p < .05.

^**

p < .01.