Table 2.

Prevalence and effects of age on the report of the 11 criteria-relevant basic symptoms (BS) assessed in all age groups, irrespective of novelty and frequency requirements; binary logistic regression analyses with method “enter” and 20- to 24-year-olds as the reference age group

Age group (years)	β	SE	Wald (df = 1)	p after bootstrap	Exp (β)	95% CI	Number present	% present
≥ 1 BS (in 20–24 years: n = 18, 12%)
8–12	1.018	0.420	5.872	0.021	2.768	1.22–6.31	12	27
13–15	1.432	0.451	10.061	0.001	4.186	1.73–10.14	11	36
16–17	0.595	0.381	2.431	0.113	1.812	0.86–3.83	15	19
18–19	0.980	0.357	7.551	0.006	2.664	1.32–5.36	21	26
25–29a	− 0.566	0.413	1.879	0.156	0.568	0.25–1.28	10	7
30–40	0.000	0.355	0.000	0.999	1.000	0.50–2.00	18	12
≥ 1 cognitive BS (in 20–24 years: n = 12, 8%)
8–12	0.946	0.492	3.696	0.049	2.577	0.98–6.76	8	18
13–15	1.584	0.497	10.164	0.002	4.875	1.84–12.91	9	29
16–17b	0.671	0.443	2.296	0.116	1.956	0.82–4.66	11	14
18–19	1.225	0.402	9.280	0.001	3.405	1.55–7.49	18	22
25–29	− 0.496	0.490	1.024	0.299	0.233	0.23–1.59	7	5
30–40	0.000	0.425	0.000	1.000	0.435	0.44–2.30	12	8
≥ 1 perceptive BS (in 20–24 years: n = 7, 5%)
8–12	0.972	0.612	2.521	0.094	2.643	0.80–8.77	5	11
13–15	0.818	0.720	1.289	0.255	2.265	0.55–9.29	3	10
16–17	0.882	0.537	2.694	0.088	2.416	0.84–6.93	8	10
18–19	0.094	0.642	0.021	0.8674	1.098	0.31–3.87	4	5
25–29	− 0.504	0.638	0.625	0.431	0.604	0.17–2.11	4	3
30–40	− 0.161	0.568	0.080	0.765	0.851	0.28–2.59	6	4

Significant predictors (p < 0.05) are in bold type, predictors with significance at statistical trend (p < 0.10) in bold italics

^aLower prevalence in comparison to 20- to 24-year-olds became significant when the cognitive BS that are only assessable from age 13 onwards were considered (Exp (β) = 0.473; 95% CI 0.23–0.98, p (bootstrap) = 0.040)

^bHigher prevalence in comparison to 20- to 24-year-olds reached statistical trend level when the cognitive BS that are only assessable from age 13 onwards were considered (Exp (β) = 1.847; 95% CI 0.89–3.83, p (bootstrap) = 0.083)