Table 5 Relationship with stress quotient based on health functional food consumption

Contents			HS1) (n=124)	MS2) (n=122)	LS3) (n=84)
Total			149.1±41.6a4)	124.2±41.1b	106.3±41.5c
Questionnaires about grade
1	I am frustrated because my grades are not as good as my parents expect it to be.	Yes	3.85±1.34	3.26±1.47	2.63±1.39
		No	3.44±1.50	3.25±1.40	3.00±1.48
2	When my parents compares my grades with others, I become depressed.	Yes	4.37±1.54	3.40±1.68	3.00±1.41
		No	4.11±1.65	3.60±1.55	3.14±1.38
3	I fear that my parents will scold me someday because of my grades.	Yes	4.28±1.55	3.07±1.68*5)	2.65±1.45
		No	3.80±1.57	3.67±1.57*	2.77±1.46
4	I am afraid my parents will be disappointed because my grades are low	Yes	4.10±1.74	2.79±1.75	2.63±1.52
		No	3.61±1.76	3.37±1.37	2.83±1.71
5	I am afraid my parents won't allowed me to enjoy my hobbies when my grades are low.	Yes	4.14±1.72	3.38±1.68	3.06±1.76
		No	3.82±1.47	3.46±1.39	2.66±1.45
6	I am frustrated because my grades are not as good as my teacher expect it to be.	Yes	3.11±1.45	2.60±1.49	2.13±1.25
		No	3.13±1.62	2.92±1.44	2.40±1.35
7	When my teacher compares my grades with others, I become depressed.	Yes	3.33±1.61	2.54±1.60	2.35±1.44
		No	3.17±1.61	2.85±1.47	2.49±1.31
8	I fear that my teacher will scold me someday because of my grades.	Yes	3.15±1.53	2.19±1.35*	1.98±1.21
		No	2.69±1.39	2.69±1.16*	2.17±1.25
9	When my grades are low, my teacher nags which makes me irritated	Yes	2.78±1.51	2.15±1.39*	1.96±1.20
		No	2.80±1.53	2.69±1.25*	2.17±1.27
10	I fear that my teacher will scold me someday because of my grades.	Yes	3.04±1.51	2.51±1.54	2.23±1.43
		No	2.76±1.52	2.67±1.15	2.20±1.30
11	I feel stressed when my grades don't improve even if I study hard.	Yes	4.21±1.67	3.75±1.77	3.27±1.61
		No	4.00±1.62	3.73±1.40	2.91±1.62
12	My bad grades make me angry	Yes	4.27±1.60	3.66±1.65	3.27±1.53
		No	4.05±1.53	3.88±1.54	2.86±1.61
13	I feel depressed when I think of my grades	Yes	4.18±1.59	3.28±1.68	2.69±1.50
		No	3.76±1.49	3.44±1.49	2.77±1.61
14	I am afraid that my grades might drop	Yes	4.15±1.52	3.31±1.72	2.83±1.60
		No	3.69±1.56	3.65±1.45	2.54±1.44
15	My goal is high, but I feel depressed because my grades don't meet the goal	Yes	3.91±1.65	3.34±1.73	2.92±1.54
		No	3.69±1.60	3.62±1.62	2.63±1.50
16	When my parents tell me to listen to my teacher in class, it irritates me.	Yes	2.97±1.69	2.37±1.57	1.92±1.03
		No	3.26±1.49	2.65±1.30	2.46±1.48
17	When my parents ask me what I learned in class, it irritates me.	Yes	3.01±1.75	2.34±1.58	1.88±0.98*
		No	3.17±1.36	2.65±1.22	2.63±1.57*
18	I feel frustrated when my parents tell me to fully understand everything in class.	Yes	3.10±1.75	2.43±1.59	1.90±0.99
		No	3.34±1.42	2.83±1.25	2.23±1.40
19	I feel blue when my parents scolded me for failing in class.	Yes	3.02±1.65*	2.37±1.52*	1.98±1.10
		No	3.63±1.52*	2.92±1.38*	2.14±1.38
20	I feel uncomfortable when my parents tell me to sit straight in a good posture in class	Yes	2.68±1.55	2.10±1.45*	1.85±0.90
		No	2.94±1.37	2.60±1.12*	2.06±1.33
21	I am afraid that teacher might ask a question that I don't know	Yes	3.14±1.73	2.63±1.53	2.38±1.33
		No	2.82±1.42	2.92±1.37	2.34±1.47
22	I fear that my teacher will scold me during class.	Yes	2.71±1.56	2.03±1.27*	2.08±1.20
		No	2.69±1.36	2.52±1.13*	2.09±1.36
23	I feel frustrated because I cannot understand what my teacher explains.	Yes	2.76±1.43	2.24±1.37	2.08±1.05
		No	2.84±1.51	2.60±1.19	2.26±1.27
24	I get stressed out because I don't like the way my teacher teaches classes.	Yes	2.75±1.61	2.09±1.16*	2.52±1.49
		No	2.82±1.43	2.62±1.16*	2.03±1.07
25	I feel angry when my teacher gives too much homework.	Yes	3.79±1.66	2.81±1.56	2.69±1.48
		No	3.44±1.48	3.02±1.42	2.26±1.22
26	I feel overwhelmed when the class time comes.	Yes	2.60±1.48	1.87±0.99*	1.98±1.12
		No	2.57±1.45	2.48±1.15*	1.94±1.08
27	I get sleepy when the class starts.	Yes	2.89±1.66	2.84±1.47	2.60±1.43
		No	3.11±1.35	3.27±1.42	2.66±1.45
28	I am frustrated during class because I cannot pay attention to the class.	Yes	2.55±1.58	1.76±0.96*	1.94±1.17
		No	2.61±1.31	2.63±1.36*	2.00±1.28
29	I feel like it's just better to study alone than listening to my teacher.	Yes	2.56±1.58	2.01±1.13*	2.27±1.47
		No	2.76±1.45	2.62±1.27*	1.91±1.22
30	I feel annoyed that there are too many things that I don't understand in class.	Yes	2.63±1.60	1.94±1.10*	2.17±1.31
		No	2.67±1.42	2.60±1.19*	2.00±1.24
Questionnaires about study
31	I get irritated when my parents demand me with too much study time.	Yes	3.97±1.60	2.76±1.70	2.33±1.31
		No	3.71±1.55	2.96±1.30	2.31±1.49
32	I feel useless when my parents compare me with others who study hard.	Yes	4.23±1.70	2.74±1.71*	2.54±1.47
		No	3.82±1.64	3.38±1.46*	2.31±1.43
33	I feel sad because my parents are never satisfied with how much I study.	Yes	3.76±1.69	2.51±1.61	2.27±1.28
		No	3.69±1.62	3.04±1.47	2.20±1.35
34	I feel irritated when my parents pressure me to study hard too much.	Yes	3.68±1.65	2.71±1.70	2.17±1.23
		No	3.71±1.52	2.92±1.34	2.00±1.33
35	I feel angry when my teacher demands me with too much study.	Yes	3.47±1.69	2.76±1.93	2.21±1.18
		No	3.05±1.44	2.71±1.29	2.29±1.53
36	I feel frustrated when my teacher tells me that the way I study is wrong.	Yes	3.02±1.57	2.44±1.59	2.38±1.36
		No	3.07±1.50	2.60±1.24	2.17±1.42
37	I feel useless when my teacher compare me with others who study hard.	Yes	3.28±1.50	2.51±1.49	2.42±1.49
		No	3.11±1.61	2.81±1.25	2.23±1.40
Questionnaires about study
38	I feel sad because my teacher is not satisfied with my grades.	Yes	2.72±1.41	2.49±3.98	2.17±1.23
		No	2.78±1.60	2.65±1.28	2.14±1.38
39	I feel annoyed when my teacher tells me to study harder.	Yes	2.69±1.38	2.06±1.31*	2.10±1.12
		No	2.65±1.51	2.62±1.21*	2.11±1.39
40	I get overwhelmed because there's too much to study.	Yes	4.00±1.51	2.71±1.58	2.46±1.40
		No	3.67±1.47	3.10±1.30	2.54±1.50
41	I am afraid because the study gets harder and harder.	Yes	4.31±1.65	2.96±1.71	2.75±1.49
		No	4.07±1.42	3.42±1.45	2.54±1.44
42	I feel pointless that I study hard without knowing why I study.	Yes	3.86±1.75	2.51±1.63	2.40±1.41
		No	3.90±1.48	2.83±1.38	2.34±1.41
43	I am frustrated because I don't know how to study effectively for each subject.	Yes	3.59±1.66	2.85±1.70	2.48±1.49
		No	3.57±1.64	3.08±1.41	2.54±1.54
44	I know I need to study more but I really don't want to study.	Yes	4.39±1.64	3.71±1.85	3.06±1.69
		No	4.38±1.44	3.94±1.55	3.14±1.68

Self-perception about stress level: high
Self-perception about stress level: medium
Self-perception about stress level: low
Mean±SD; Different capital letters indicate significant differences by GLM among the groups (p<0.05).
Mean±SD; Significantly different by t-test between the same groups (*p<0.05).