The impact of depression among chronic low back pain patients in Japan

Table 4 Correlations between presenteeism, pain, and depression among employed CLBP patients

	Spearman's rho with presenteeism	P value
Overall work impairment %	0.990^a	<0.001
Severity of lower back pain	0.267^a	<0.001
Severity of pain in the prior week (based on NRS)	0.297^a	<0.001
Current severity of pain (based on NRS)	0.245^a	<0.001
Frequency of problems with pain	0.115	0.077
Sites of pain in addition to LBP (number, 0–6)	0.239^a	0.002
Depression severity based on PHQ-9	0.342^a	<0.001

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