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Table 1 Proportion registered with primary care diagnoses among children with CFS/ME or type 1 diabetes mellitus (T1DM) in specialist health care, and for children in the general population

From: Comorbidities treated in primary care in children with chronic fatigue syndrome / myalgic encephalomyelitis: A nationwide registry linkage study from Norway

  CSF/ME (n = 1670) T1DM (n = 4937) General child population (n = 1 337 508)
  # with condition Proportion % (99 % CI) # with condition Proportion % (99 % CI) # with condition Proportion % (99 % CI)
Diagnoses related to CFS/ME
 Weakness / general tiredness (A04) 1501 89.9 (88.0–91.8) 666 14.5 (13.1–16.0) 140 915 11.1 (11.0–11.2)
 Neurasthenia (P78) 156 9.3 (7.5–11.2) 2 0.0 (0.0–0.1) 1220 0.1 (0.1–0.1)
 Sleep disturbance (P06) 258 15.4 (13.2–17.7) 204 4.1 (3.3–4.9) 43 795 3.3 (3.2–3.3)
 Muscle pain (L18) 159 9.5 (7.7–11.4) 173 3.8 (3.0–4.6) 29 242 2.3 (2.3–2.4)
Common mental disorders
 Depressive disorder (P76) 230 13.8 (11.6–15.9) 231 5.4 (4.4–6.3) 32 399 2.7 (2.7–2.8)
 Anxiety disorder/anxiety state (P74) 73 4.4 (3.1–5.7) 83 1.8 (1.3–2.4) 13 347 1.1 (1.1–1.1)
Diagnoses related to infections
 Influenza (R80) 412 24.7 (22.0–27.4) 739 15.1 (13.6–16.5) 133 281 10.1 (10.0–10.1)
 Infectious mononucleosis (A75) 288 17.2 (14.9–19.6) 164 3.7 (2.9–4.5) 35 662 2.9 (2.8–2.9)
 Tonsillitis acute (R76) 313 18.7 (16.3–21.2) 577 12.3 (11.0–13.6) 162 526 12.3 (12.3–12.4)
 Strep throat (R72) 236 14.1 (11.9–16.3) 483 9.9 (8.7–11.0) 126 394 9.6 (9.5–9.6)
 Pneumonia (R81) 207 12.4 (10.8–14.5) 356 7.3 (6.2–8.3) 90 027 6.7 (6.6–6.7)
Other diagnoses
 Diabetes (T89/T90) 1 0.1 (0.0–0.2) 4238 86.0 (84.6–87.4) 1079 0.1 (0.1–0.1)
 Asthma (R96) 292 17.5 (15.1–19.9) 579 11.3 (10.1–12.6) 161 103 11.5 (11.4–11.6)
 Migraine (N89) 187 11.2 (9.2–13.2) 128 3.0 (2.3–3.7) 30 255 2.5 (2.5–2.5)
 Hyperkinetic disorder (P81) 54 3.2 (2.1–4.3) 175 3.0 (2.4–3.6) 37 387 2.4 (2.4–2.5)
 Congenital anomaly musculoskeletal (L82) 54 3.2 (2.1–4.3) 89 1.8 (1.3–2.3) 28 096 2.0 (2.0–2.1)
 Child behaviour symptom/complaint (P22) 71 4.3 (3.0–5.5) 143 2.7 (2.1–3.4) 37 241 2.5 (2.5–2.5)
 Psychological disorders, other (P99) 55 3.3 (2.2–4.4) 95 1.9 (1.3–2.4) 17 008 1.2 (1.2–1.2)
 Endocrine/metabolic/nutritional disorder, other (T99) 65 3.9 (2.7–5.1) 152 3.4 (2.7–4.2) 21 051 1.7 (1.7–1.7)
  1. Proportions were adjusted for sex and age group (3-year categories) by direct standardization, using the population with CFS/ME as the reference population