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Table 2 Proportion registered with primary care diagnoses within the period 2 years prior to the first registered CFS/ME or type 1 diabetes mellitus (T1DM) diagnosis in specialist health care

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)
  # with condition Proportion % (99 % CI) # with condition Proportion % (99 % CI)
Diagnoses related to CFS/ME
 Weakness / general tiredness (A04) 1226 73.4 (70.6–76.2) 164 3.5 (2.8–4.3)
 Neurasthenia (P78) 58 3.5 (2.3–4.6) 1 0.0 (0.0–0.1)
 Sleep disturbance (P06) 94 5.6 (4.2–7.1) 42 0.9 (0.5–1.2)
 Muscle pain (L18) 59 3.5 (2.4–4.7) 37 0.8 (0.4–1.2)
Common mental disorders
 Depressive disorder (P76) 94 5.6 (4.2–7.1) 19 0.4 (0.1–0.6)
 Anxiety disorder/anxiety state (P74) 19 1.1 (0.5–1.8) 15 0.3 (0.1–0.5)
Diagnoses related to infections
 Influenza (R80) 173 10.4 (8.4–12.3) 154 3.1 (2.4–3.8)
 Infectious mononucleosis (A75) 185 11.1 (9.1–13.1) 25 0.5 (0.2–0.8)
 Tonsillitis acute (R76) 85 5.1 (3.7–6.5) 161 3.4 (2.6–4.1)
 Strep throat (R72) 74 4.4 (3.1–5.7) 123 2.5 (1.8–3.1)
 Pneumonia (R81) 83 5.0 (3.6–6.3) 107 2.2 (1.6–2.8)
Other diagnoses
 Diabetes (T89/T90) 0 0.0 (0.0–0.0) 1 362 28.2 (26.4–29.9)
 Asthma (R96) 134 8.0 (6.3–9.7) 253 5.0 (4.1–5.8)
 Migraine (N89) 102 6.1 (4.6–7.6) 30 0.6 (0.3–0.8)
 Hyperkinetic disorder (P81) 35 2.1 (1.2–3.0) 73 1.2 (0.8–1.6)
 Congenital anomaly musculoskeletal (L82) 19 1.1 (0.5–1.8) 32 0.7 (0.3–1.0)
 Child behaviour symptom/complaint (P22) 32 1.9 (1.1–2.8) 52 1.0 (0.6–1.4)
 Psychological disorders, other (P99) 22 1.3 (0.6–2.0) 17 0.3 (0.1–0.5)
 Endocrine/metabolic/nutritional disorder, other (T99) 18 1.1 (0.4–1.7) 54 1.3 (0.8–1.7)
  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