College students 1 Depression, Anxiety and Stress Scale-21 1 Perceived Stress Scale 1 Review 1 Self-help 1 Stress management 1 Unguided interventions acceptance and commitment therapy 1 anxiety 1 biofeedback 1 cognitive behavioral therapy 1 college student 1 cost effectiveness analysis 1 depression 1 emotional stability 1 female 1 human 1 meditation 1 mental health 1 mental stress 1 meta analysis 1 mindfulness 1 outcome assessment 1 physiological stress 1 quality control 1 randomized controlled trial (topic) 1 restlessness 1 self help 1 sensitivity analysis 1 stress management 1