Table. Case numbers, length of inpatient stay, and ICD-10 F-diagnoses in hospitals before and during the pandemic.

	CHild and adolescent psychiatry			Pediatrics
	N (2019)	N (2021)	OR (% change)[95% CI]	N (2019)	N (2021)	OR (% change)[95% CI]
Case numbers ICD-10 F diagnoses	24 408	23 777	−2.59***	14 853	12 213	−17.77***
Length of inpatient stay (days)	36.63	34.91	−4.70***	7.15	8.51	+19.02***
Alcohol intoxication	90	82	0.93 (−7) [0.69; 1.26]	4 862	2 440	0.51 (−49) [0.49; 0.54]
(atypical) Anorexia nervosa	800	962	1.24 (+24) [1.13; 1.37]	611	1 057	2.21 (+121) [1.99; 2.45]
Depressive disorders	7 451	9 010	1.39 (+39) [1.34; 1.44]	325	396	1.50 (+50) [1.29; 1.74]
Reactions to severe stress	1 115	1 183	1.09 (+9) [1.01; 1.19]	380	303	0.97 (−3) [0.83; 1.13]
Combined disorders of conduct and emotions	1 267	810	0.64 (−36) [0.59; 0.70]	34	19	0.68 (−32) [0.39; 1.19]
Other diagnoses	13 685	11 730		8 535	7 827
Deliberate self harm	2 146	2 137	1.02 (+2) [0.96; 1.09]	106	171	1.98 (+98) [1.55; 2.52]

N, absolute frequency in the remuneration field psychiatry grouped according to PEPP system 2019 or PEPP system 2021; remuneration field pediatrics in analogy; the first half year, respectively;

% Change interpreted from odds ratios (OR) derived from the annual odds; * p < 0.05; ** p < 0.01; *** p < 0.001; CI, confidence interval

Deliberate self harm is not a main diagnosis but a secondary diagnosis. For this reason it can be coded additionally.