Table 6.

Reference values.

		Low symptoms severity			−1 SD					Md					+1 SD			High symptoms severity
		Scale
N
2.5%	5%	16%	30%	40%	50%	60%	70%	85%	95%	97.5%
Total	925	0	0	0	1	2	3	3	4	8	14	17
Physical		0	0	0	0	0	0	1	1	3	7	8
Emotional		0	0	0	0	1	1	1	2	3	3	4
Cognitive		0	0	0	0	0	0	1	1	2	4	5
Fatigue		0	0	0	0	0	0	0	0	1	2	3

N: absolute frequencies (n = 122 participants from the general population sample suffering at least from one chronic health condition are excluded); 50% percentiles represent 50% of the distribution corresponding to the median (Md); SD, standard deviation (corresponding to the cut-offs of the normal distribution); values from −1 standard deviation (16%) to +1 standard deviation (85%, round up to the next integer) are within the normal range (i.e., not clinically relevant symptom severity); values below 16% indicate low symptoms severity (i.e., absence of PCSI-SR8 symptoms) and values above 85% indicate high symptom severity (i.e., presence of clinically relevant PCSI-SR8 symptoms).