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. 2016 Sep 21;4(3):e111. doi: 10.2196/mhealth.5960

Table 3.

Wilcoxon signed rank test results between t and t_n.

PHQ-9 score^a	tn, median PHQ-9 (IQR^b)	t0, median PHQ-9 (IQR)	N	z ^c	P value
t2, median (IQR)	14.00 (11.25-20.00)	13.00 (11.00-20.00)	12	0.283	.77
t4, median (IQR)	13.00 (8.75-17.25)	13.00 (11.00-20.00)	12	1.216	.22
t6, median (IQR)	11.00 (8.25-16.00)	13.00 (11.00-20.00)	12	2.013	.04^d
t8, median (IQR)	10.00 (8.75-13.75)	13.00 (11.00-20.00)	12	2.479	.01^d

^a^aPHQ-9: Personal Health Questionnaire.

^bIQR: interquartile range.

^cWilcoxon signed rank test.

^dSignificant at the 5% level.