eTable 1. The most common causes of hospitalization in adolescence and early adulthood among Swedish men and women, by ICD-chapter.

Diagnoses (ICD-9 code)* / No. hospitalized† /

No. hospitalized among exposed†

Preterm (only) / SGA (only) / Preterm and SGA

Infections and parasitic diseases (001-139)

/

6,075

/

231

/

310

/

34

Ill-defined intestinal infections (009) / 1,079 / 44 / 71 / 4
Infectious mononucleosis (075) / 1,454 / 42 / 60 / 8
Viral or chlamydial infections classified elsewhere and of unspecified site (079) / 888 / 40 / 45 / 3

Neoplasm (140-239)

/

2,273

/

82

/

104

/

13

Malignant neoplasm of testis and other male genital organs (186)‡ / 59 / 3 / 1 / 1
Hodgkin’s disease (201) / 96 / 3 / 1 / 0
Benign neoplasm of bone and articular cartilage (213) / 439 / 16 / 18 / 2
Benign neoplasm of skin (216) / 131 / 4 / 5 / 0
Benign neoplasm of ovary (220)§ / 312 / 9 / 19 / 3

Endocrine, nutritional, and metabolic diseases (240-279)

/

2,450

/

124

/

127

/

16

Thyrotoxicosis with or without goitre (242) / 158 / 5 / 7 / 2
Diabetes mellitus (250) / 1,393 / 80 / 52 / 5
Other disorders of pancreatic internal secretion (251) / 190 / 16 / 12 / 0
Other endocrine disorders (259) / 163 / 8 / 19 / 3
Obesity and other hyperalimentation (278) / 182 / 4 / 8 / 1

Blood diseases and immunity disorders (280-289)

/

1,479

/

56

/

80

/

9

Iron deficiency anemia (280) / 80 / 5 / 3 / 0
Coagulation defects (286) / 28 / 1 / 2 / 1
Purpura and other hemorrhagic conditions (287) / 160 / 7 / 6 / 3
Other diseases of blood and blood-forming organs (289) / 1103 / 41 / 63 / 5

Mental disorders (290-319)

/

6,691

/

326

/

448

/

47

Drug dependence (304) / 496 / 24 / 33 / 6
Nondependent abuse of drugs (305) / 1,861 / 97 / 113 / 7
Special symptoms or syndromes not elsewhere classified (307) / 993 / 40 / 47 / 9
Adjustment reaction (309) / 883 / 35 / 67 / 6
Disturbance of emotions specific to childhood and adolescence (313) / 835 / 39 / 68 / 3

Diseases of the nervous system (320-389)

/ 5,050 / 298 / 351 / 58
Epilepsy (345) / 867 / 55 / 73 / 8
Migraine (346) / 437 / 18 / 26 / 2
Strabismus and other disorders of binocular eye movements (378) / 626 / 48 / 45 / 5
Nonsuppurative otitis media and Eustachian tube disorders (381) / 399 / 14 / 35 / 7

Diseases of the circulatory system (390-459)

/ 1,911 / 88 / 107 / 13
Acute pericarditis (420) / 284 / 10 / 11 / 2
Cardiac dysrhythmias (427) / 317 / 14 / 15 / 0
Phlebitis and thrombophlebitis (451) / 134 / 8 / 13 / 0
Other venous embolism and thrombosis (453) / 109 / 4 / 11 / 1
Varicose veins of other sites (456) / 169 / 9 / 8 / 1

Diseases of the respiratory system (460-519)

/ 13,637 / 546 / 680 / 70
Acute tonsillitis (463) / 1,064 / 46 / 50 / 3
Deflected nasal septum (470) / 774 / 29 / 36 / 8
Chronic disease of tonsils and adenoids (474) / 6,703 / 232 / 314 / 28
Peritonsillar abscess (475) / 1,105 / 44 / 42 / 0
Asthma (493) / 1,131 / 52 / 71 / 8

Diseases of the digestive system (520-579)

/ 14,362 / 576 / 647 / 65
Dentofacial anomalies, including malocclusion (524) / 872 / 43 / 39 / 1
Acute appendicitis (540) / 8,496 / 335 / 341 / 35
Inguinal hernia (550)‡ / 386 / 15 / 20 / 1
Cholelithiasis (574) / 666 / 21 / 37 / 4

Diseases of the genitourinary system (580-629)

/ 8,002 / 318 / 510 / 43
Other disorders of urethra and urinary tract (599) / 592 / 28 / 36 / 1
Redundant prepuce and phimosis (605)‡ / 187 / 8 / 4 / 0
Other disorders of male genital organs (608)‡ / 693 / 37 / 65 / 7
Other disorders of breast (611) / 1,431 / 25 / 84 / 8
Inflammatory disease of ovary, fallopian tube, pelvic cellular tissue, and peritoneum (614)§ / 855 / 35 / 55 / 5
Noninflammatory disorders of ovary, fallopian tube, or broad ligament (620)§ / 890 / 35 / 62 / 7

Diseases of the skin and subcutaneous tissue (680-709)

/ 2,111 / 101 / 89 / 14
Other cellulitis and abscess (682) / 274 / 9 / 6 / 1
Pilonidal cyst (685) / 679 / 30 / 22 / 5
Urticaria (708) / 325 / 16 / 15 / 2

Diseases of the musculoskeletal system and connective tissue (710-739)

/ 6,842 / 278 / 347 / 33
Internal derangement of knee (717) / 1,571 / 60 / 77 / 4
Other derangement of joint (718) / 744 / 34 / 30 / 3
Osteochondropathies (732) / 434 / 15 / 16 / 6
Curvature of spine (737) / 521 / 23 / 33 / 4

Congenital anomalies (740-759)

/ 2,898 / 150 / 217 / 21
Congenital anomalies of ear, face, and neck (744) / 604 / 23 / 20 / 1
Cleft palate and cleft lip (749) / 268 / 12 / 23 / 0
Congenital anomalies of genital organs (752) / 397 / 28 / 34 / 6
Congenital musculoskeletal deformities (754) / 255 / 15 / 17 / 2

Symptoms, signs, and ill-defined conditions (780-799)

/ 18,237 / 775 / 1,066 / 91
General symptoms (780) / 2,270 / 118 / 136 / 12
Symptoms involving head and neck (784) / 914 / 37 / 46 / 4
Symptoms involving respiratory system and other chest symptoms (786) / 932 / 49 / 49 / 3
Other symptoms involving abdomen and pelvis (789) / 13,483 / 568 / 800 / 69

Injury, poisoning, and other external causes (800-999)

/ 30,901 / 1,281 / 1,541 / 137
Fracture of tibia and fibula (823) / 1,608 / 61 / 73 / 3
Sprains and strains of knee and leg (844) / 2,005 / 74 / 99 / 8
Concussion (850) / 8,626 / 373 / 445 / 38
Poisoning by analgesics, antipyretics, and anti-rheumatics (965) / 1,074 / 43 / 71 / 5

*The three most commonly occurring three-digit level main diagnoses among the studied men and/or women, respectively, listed in each ICD-chapter.

†Number of persons who were hospitalized one or more times according to each ICD-chapter and main diagnosis, respectively.

‡Diagnosis specific for men only.

§Diagnosis specific for women only.

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