Table 1. Characteristics of Cases and Matched Controls

Baseline characteristic	Full sample, No. (%)		Age <25 y, No. (%)		Age ≥25 y, No. (%)
Baseline characteristic	Cases (n=10 388)	Controls (n=51 672)	Cases (n=3 406)	Controls (n=17 027)	Cases (n=6 982)	Controls (n=34 645)
Age, median (IQR), y	34.6 (20.0-45.7)	34.6 (19.6-45.6)	15.8 (12.3-19.6)	15.8 (12.3-19.6)	42.2 (34.4-49.3)	42.1 (34.4-49.1)
Follow-up, median (IQR), y	4.1 (1.9-6.8)	4.1 (1.9-6.8)	4.2 (1.9-7.0)	4.2 (1.9-6.9)	4.0 (1.9-6.8)	4.0 (1.9-6.8)
Sex
Female	4234 (40.8)	21 071 (40.8)	1322 (38.8)	6607 (38.8)	2912 (41.7)	14 464 (41.7)
Male	6154 (59.2)	30 601 (59.2)	2084 (61.2)	10 420 (61.2)	4070 (58.3)	20 181 (58.3)
Country of birth
Sweden	9520 (91.6)	46 805 (90.6)	3208 (94.2)	15 935 (93.6)	6312 (90.4)	30 870 (89.1)
Other	868 (8.4)	4867 (9.4)	198 (5.8)	1092 (6.4)	670 (9.6)	3775 (10.9)
Educational level
Primary or lower secondary	3081 (29.7)	13 741 (26.6)	1182 (34.7)	5626 (33.0)	1899 (27.2)	8115 (23.4)
Upper secondary	4062 (39.1)	19 942 (38.6)	410 (12.0)	2313 (13.6)	3652 (52.3)	17 629 (50.9)
Postsecondary or postgraduate	1449 (13.9)	9064 (17.5)	58 (1.7)	367 (2.2)	1391 (19.9)	8697 (25.1)
People aged <16 y	1680 (16.2)	8374 (16.2)	1680 (49.3)	8374 (49.2)	NA	NA
Psychiatric comorbidities
Anxiety disorders	3489 (33.6)	14 930 (28.9)	670 (19.7)	2811 (16.5)	2819 (40.4)	12 119 (35.0)
Autism spectrum disorder	803 (7.7)	4390 (8.5)	343 (10.1)	1853 (10.9)	460 (6.6)	2537 (7.3)
Bipolar disorder	830 (8.0)	3847 (7.4)	88 (2.6)	369 (2.2)	742 (10.6)	3478 (10.0)
Conduct disorder	189 (1.8)	799 (1.5)	139 (4.1)	634 (3.7)	50 (0.7)	165 (0.5)
Depressive disorder	3323 (32.0)	15 096 (29.2)	582 (17.1)	2574 (15.1)	2741 (39.3)	12 522 (36.1)
Eating disorders	363 (3.5)	1609 (3.1)	86 (2.5)	417 (2.4)	277 (4.0)	1192 (3.4)
Intellectual disability	276 (2.7)	1151 (2.2)	154 (4.5)	626 (3.7)	122 (1.7)	525 (1.5)
Personality disorders	1467 (14.1)	6137 (11.9)	167 (4.9)	640 (3.8)	1300 (18.6)	5497 (15.9)
Schizophrenia	516 (5.0)	2102 (4.1)	72 (2.1)	199 (1.2)	444 (6.4)	1903 (5.5)
Substance use disorders	3332 (32.1)	12 693 (24.6)	500 (14.7)	1638 (9.6)	2832 (40.6)	11 055 (31.9)
Somatic comorbidities
Obesity	699 (6.7)	2186 (4.2)	217 (6.4)	563 (3.3)	482 (6.9)	1623 (4.7)
Type 2 diabetes	287 (2.8)	657 (1.3)	22 (0.6)	30 (0.2)	265 (3.8)	627 (1.8)
Dyslipidemia	81 (0.8)	404 (0.8)	6 (0.2)	12 (0.1)	75 (1.1)	392 (1.1)
Sleep disorders	642 (6.2)	2507 (4.9)	128 (3.8)	456 (2.7)	514 (7.4)	2051 (5.9)

I studiet er vist en tabel med karakteristika for cases (n=10388) og matched controls (n=51672). Kontroller er matchede med cases.

Hvad er hovedårsagen til at der er matchet?

\ud83c\udfb2 B10 Tilfældig blanding

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