Table 3.

Metrics for each trained model.

	Random forest				Support vector machine
	Items	Precision	Recall	F1-Score	Precision	Recall	F1-Score	Support
	No Stress	0.58	0.66	0.61	0.58	0.58	0.58	359
Complete Dataset	Stress	0.52	0.43	0.47	0.50	0.51	0.51	306
	Accuracy	–	–	0.55	–	–	0.54	665
	Weighted Average	0.55	0.55	0.55	0.54	0.54	0.54	665
	No Stress	0.59	0.73	0.65	0.57	0.57	0.57	283
Healthy Subjects	Stress	0.50	0.34	0.40	0.45	0.45	0.45	221
	Accuracy	–	–	0.56	–	–	0.52	504
	Weighted Average	0.55	0.56	0.54	0.52	0.52	0.52	504
	No Stress	0.64	0.88	0.74	0.63	0.75	0.69	95
Subjects Aged 18–24	Stress	0.50	0.19	0.27	0.43	0.31	0.36	59
	Accuracy	–	–	0.62	–	–	0.58	154
	Weighted Average	0.58	0.62	0.56	0.56	0.58	0.56	154
	No Stress	0.39	0.16	0.23	0.42	0.14	0.22	69
Subjects Aged 25–34	Stress	0.67	0.87	0.76	0.67	0.89	0.77	133
	Accuracy	–	–	0.63	–	–	0.64	202
	Weighted Average	0.57	0.63	0.58	0.58	0.64	0.58	202
	No Stress	0.69	0.91	0.78	0.68	0.67	0.68	116
Subjects Aged 35–44	Stress	0.61	0.26	0.37	0.43	0.45	0.44	65
	Accuracy	-	-	0.67	-	-	0.59	181
	Weighted Average	0.66	0.67	0.63	0.59	0.59	0.53	181
	No Stress	0.70	0.84	0.76	0.68	0.86	0.76	50
Subjects Aged 45–64	Stress	0.53	0.33	0.41	0.50	0.26	0.34	27
	Accuracy	–	–	0.66	–	–	0.65	77
	Weighted Average	0.64	0.66	0.64	0.62	0.65	0.61	77
	No Stress	0.64	0.68	0.66	0.57	0.56	0.57	95
Male Participants	Stress	0.62	0.58	0.60	0.52	0.53	0.52	85
	Accuracy	–	–	0.63	–	–	0.55	180
	Weighted Average	0.63	0.63	0.63	0.55	0.55	0.55	180
	No Stress	0.59	0.55	0.57	0.59	0.67	0.63	250
Female Participants	Stress	0.52	0.56	0.53	0.55	0.47	0.50	214
	Accuracy	–	–	0.55	–	–	0.58	464
	Weighted Average	0.56	0.55	0.55	0.57	0.58	0.57	464
	No Stress	0.62	0.74	0.68	0.64	0.63	0.64	180
Low SES Participants	Stress	0.45	0.32	0.37	0.45	0.45	0.45	118
	Accuracy	–	–	0.57	–	–	0.56	298
	Weighted Average	0.55	0.57	0.56	0.56	0.56	0.56	298
	No Stress	0.53	0.42	0.47	0.55	0.48	0.51	161
Medium and High SES Participants	Stress	0.53	0.64	0.58	0.55	0.62	0.58	167
	Accuracy	–	–	0.53	–	–	0.55	328
	Weighted Average	0.53	0.53	0.52	0.55	0.55	0.55	328
	No Stress	0.57	0.51	054	0.60	0.54	0.56	134
Students	Stress	0.54	0.60	0.57	0.56	0.62	0.59	128
	Accuracy	–	–	0.55	–	–	0.58	262
	Weighted Average	0.56	0.55	0.55	0.58	0.58	0.58	262
	No Stress	0.55	0.69	0.61	0.56	0.69	0.62	200
Workers	Stress	0.49	0.35	0.41	0.52	0.39	0.45	170
	Accuracy	–	–	0.53	–	–	0.55	370
	Weighted Average	0.52	0.53	0.52	0.54	0.55	0.54	370