Table 3. The Comparison of Serotonin Levels in HIV-Positive Participants with Depressed and Healthy Samples from Previous Studies Using a One-Sample T-Test.

Variable	Mean ± SD	Test-value	Sample	City/Country	p-value	References
Serotonin	84.48±57.91	95.10±71.11	Depression patient	Semarang/Indonesia	0.192	(23)
		70.77±46.23	Depression patient	Romania	0.094	(22)
		73.75±n.a	Depression patient	India	0.187	(16)
		79.8±52.60	Depression patient	Korea	0.562	(24)
		179.30±177.78	Healthy people	Ubud/Indonesia	<0.001	(25)
		154.17±20.90	Healthy people	Denpasar/Indonesia	<0.001	(26)
		119±n.a	Healthy people	California/USA	<0.001	(27)
		114.54 ± 51.10	Healthy people	Normandy/France	<0.001	(28)
		185 ± 68.0	Healthy people	Los Angeles/USA	<0.001	(29)