Middle East Current Psychiatry

Table 3 Multiple comparisons (Scheffe)

From: Exploring the relationship of sleep quality with drug use and substance abuse among university students: a cross-cultural study

Total of PSQI
(I) DAST-10	(J) DAST-10	Mean difference (I-J)	Std. error	P value
No problems	Low level	−1.278^a	0.320	0.003
	Moderate	−2.244^a	0.473	0.000
	Substantial	−4.354^a	0.917	0.000
	Severe level	−5.795^a	1.638	0.014
Low level	Substantial	−3.076^a	0.934	0.029
Moderate	No problems	2.244^a	0.473	0.000
Substantial	No problems	4.354^a	0.917	0.000
Substantial	Low level	3.076^a	0.934	0.029

^aThe mean difference is significant at the 0.05 level

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