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Table 4 Spearman correlation between the Pittsburgh Sleep Quality Index (PSQI) and health-related fitness

From: Subjective sleep quality and association with depression syndrome, chronic diseases and health-related physical fitness in the middle-aged and elderly

  PSQI
r p
Basic condition
 Age .004 0.952
Depression .491 0.000
Self-rate health −.391 0.000
Chronic disease (Numbers) 0.200 0.001
Anthropometric index
 BMI −.076 0.204
 FFMI .001 0.987
 Waist / hip ratio .011 0.857
Physical Fitness
Sit-and reach −.131 0.028
 One-leg stand −.080 0.179
Two-min steps −.133 0.026
 Chair stand in 30s −.158 0.080
 Grip muscle strength −.105 0.195
Up-and-go −.169 0.004
 Back muscle strength −.100 0.096