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Table 4 Comparisons of Incidence, and Hazard Ratios of chronic fatigue syndrome by subtypes of burn

From: Increased risk of chronic fatigue syndrome following burn injuries

Variables N Event Rate# Crude HR (95% CI) Adjusted HR (95% CI)
Non-burn (ICD-9-CM) 68,812 349 0.86 1(Reference) 1(Reference)
Burn      
Excluded the following codes 13,845 105 1.29 1.50(1.42, 1.59)*** 1.49(1.41, 1.57)***
TBSA % < 20% (ICD-9-CM 948.0, 948.1). 3072 31 1.74 2.02(1.83, 2.21)*** 2.11(1.92, 2.31)***
TBSA % = 20% to 50% (ICD-9-CM 948.2 ~ , 948.4), 234 4 2.78 3.22(2.50, 4.15)*** 3.43(2.67, 4.40)***
TBSA % > 50% (ICD-9-CM 948.5 ~ 948.9) 53 0 0.00
Burn confined to eye and adnexa & Burn of face, head and neck (ICD-9-CM 940, 941) 906 11 2.30 2.67(2.29, 3.11)*** 2.24(1.92, 2.61)***
Burn of trunk (ICD-9-CM 942) 765 4 0.84 0.98(0.76, 1.26) 0.95(0.74, 1.22)
Burn of upper limb, except wrist and hand & Burn of lower limb (ICD-9-CM 943, 945) 745 8 1.96 2.27(1.90, 2.72)*** 1.84(1.54, 2.20)***
Burn of wrist and hand (ICD-9-CM 944) 10,375 80 1.35 1.56(1.47, 1.66)*** 1.43(1.35, 1.53)***
Others 4413 37 1.34 1.56(1.43, 1.70)*** 1.48(1.35, 1.61)***
  1. Rate#, incidence rate, per 1000 person-years; Crude HR, crude hazard ratio
  2. Adjusted HR: multivariate analysis including age, sex, and comorbidities of diabetes, obesity, renal disease, rheumatoid arthritis, HIV, malignancy, depression, anxiety, sleep disorder and irritable bowel syndrome
  3. ***p < 0.001
  4. TBSA = Total burn surface area