Table 3.

Distribution of the literature by age group and/or developmental stage to which the use of the concept was linked.

Age and Stage	Number of sources (n = 62)
Age and stage defined	18     (29.03%)
02-05 (young children)	1     (1.61%)
10-19 (adolescents)	2     (3.23%)
10-24 (young people)	2     (3.23%)
10-25 (young people)	1     (1.61%)
10-25 (youth)	1     (1.61%)
11,14 & 17 (adolescents)	1     (1.61%)
12-19 (adolescents)	1     (1.61%)
12-21 (adolescent and young adult)	1     (1.61%)
12-25 (young people)	1     (1.61%)
15-17 (adolescents)	1     (1.61%)
15-29 (adolescent and young adult)	1     (1.61%)
16-25 (young adults)	1     (1.61%)
18-30 (post-adolescent young persons)	1     (1.61%)
19-25 (young adults)	1     (1.61%)
Adolescents (11–15) and young adults (16–25)	1     (1.61%)
Adolescents (11–18) and youth	1     (1.61%)
Age but not stage defined	1     (1.61%)
18–28	1     (1.61%)
Stage but not age defined	35     (56.45%)
Adolescents	7     (11.29%)
Adolescents and young adults	2     (3.23%)
Adults	1     (1.61%)
Children	2     (3.23%)
Neonatal	1     (1.61%)
Young adults	2     (3.23%)
Young people	15     (24.19%)
Youth	5     (8.06%)
Neither age nor stage defined	8     (12.90%)
Young patients	2     (3.23%)
Not Applicable	6     (9.68%)