Validation of actigraphy to assess circadian organization and sleep quality in patients with advanced lung cancer

Table 4 Correlation of PSQI components and Actigraphy during the Usual Sleep Period

Actigraphy Parameters (Sleep Period)	PSQI Sleep Disturbance	PSQI Sleep Medicine Use	PSQI Daytime Dysfunction	Global PSQI Score
*Inpatients* (n = 35)
Wake Minutes	ns	0.44 (0.025)	ns	ns
Wake Episodes	ns	0.34 (0.09)	ns	ns
Mean Wake Episode	ns	0.40 (0.043)	ns	ns
Long Wake Episode	ns	0.47 (0.014)	ns	ns
Longest Wake Episode	ns	0.41 (0.038)	ns	ns
Wake After Sleep Onset	ns	0.35 (0.077)	ns	ns
Sleep Latency	ns	0.62 (< 0.001)	ns	ns
Sleep Efficiency	ns	ns	ns	ns
Sleep Episodes	ns	041 (0.038)	ns	ns
Long Sleep Episode	ns	ns	ns	ns
*Outpatients* (n = 33)
Wake Minutes	ns	ns	ns	ns
Wake Episodes	0.63 (0.005)	ns	0.55 (0.015)	0.49 (0.01)
Mean Wake Episode	ns	ns	ns	ns
Long Wake Episode	ns	-0.43 (0.031)	ns	ns
Longest Wake Episode	ns	ns	ns	ns
Wake After Sleep Onset	ns	ns	ns	-0.46 (0.018)
Sleep Latency	ns	-0.38 (0.058)	ns	ns
Sleep Efficiency	ns	ns	ns	ns
Sleep Episodes	-0.63 (0.005)	ns	-0.57 (0.011)	-0.49 (0.011)
Long Sleep Episode	-0.53 (0.023)	ns	-0.47 (0.043)	-0.41 (0.035)

^a Correlations are shown only for p-values < 0.05; ns = not significant; p-values are in ( ).