Table 6.

Mann-Whitney U test summary table for impacts of problematic khat use

Variables	Problematic khat use
	Low risk		High risk
Psychological distress	Median rank	N	Median rank	N	U- test	Z	p
	6	51	10	49	518	-2.71	.007*
Social support	10	51	10	49	1129	-1	.32
Harmful drinking	.00	51	6	49	922.50	-2.61	.009*
Threatening experiences	27	51	26	49	1093	-1.10	.30

*p < 0.005