The Effects of Pythagorean Self-Awareness Intervention on Young Adolescents in Primary School-Α One Arm Clinical Trial

Stress in Children (SiC) Questionnaire: This is a self-report psychometric instrument that consists of 21 items measuring physical, emotional and symptomatic aspects of stress in children. Each question is answered using a 4-point Likert-type scale (1 = never, 4 = very often). We expect reduction.

State-trait anxiety in children (STAIC): This is a "how-I-feel" questionnaire consisting of two forms of 20 items each which was designed as a research tool for the study of anxiety in children aged 9 to 12 years old. Half of the questions ask children how they feel at a particular moment in time responding to the state-anxiety scale, and the other half set of questions address how they usually feel responding to the trait-anxiety scale. Each item is answered using a 3-point Likert scale ranging from 3=very often to 1=rarely.We expect reduction.

KIDMED index: This is the Mediterranean diet quality index for children and adolescents which consists of 16 binary items(yes/no). Questions denoting a negative aspect regarding the MD were assigned a value of -1, and those with a positive one were assigned +1. We expect increase.

Healthy Lifestyle and Personal Control Questionnaire adapted for Children (HLPCQ): The HLPCQwas developed by the Postgraduate Course Stress Management and Health Promotion, School of Medicine, National and Kapodistrian University of Athens. Daily routine of the respondents was assessed with questions concerning (a) daily sleep, (b) breakfast, (c) lunch and (d) dinner and the regularity of components of their daily schedule Respondents were asked to give their answers ranging from 1 "never" to 4 "very often". Daily habits were assessed with a 4-point scale ranging from 1 "never" to 4 "always" for questions concerning eating habits, physical exercise, participation in sports, relations with relatives, support from friends. We expect increase.

Peer relations questionnaire for children (PRQ): The questionnaire was developed by Rigby and Slee (1993) and contains three subscales with 20 items. Bully subscale evaluates the tendency of a child to bully others and consists of 6 questions. The victim subscale evaluates the tendency to be victimized by others. The pro social subscale assessed the tendency to act in a pro social or cooperative manner. Four filler items are also included. Participants were asked to give their answers ranging from 1 "never" to 4 "very often". We expect reduction in victim-bully scales and increase in prosocial scale.

Hair cortisol concentrations (HCC): The collection of hair tufts from each study participant took place at baseline and after three months (one month after completion of the intervention). From each participant, hair tuft was collected from the posterior vertexas close to the scalp as possible and stored in a paper envelope at room temperature, pending analysis. Collected hair segments were of one, up to multiple centimeters (cm) of length. Hair has a fairly predictable growth rate of about 1 cm/month. Therefore, the closest part of 1 cm to the scalp approaches the production of last month's cortisol. The second nearest 1 cm section approaches production during the month before, and so on.