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Table 2 Patient characteristics

From: Factors affecting health-related quality of life in Thai children with thalassemia

  N (%)/Mean (SD)
Gender (n = 314)  
   Male 159 (50.6%)
   Female 155 (49.4%)
Age (years) (n = 315) 10.0 (3.3)
Diagnosis (n = 310)  
   β-thalassemia/Hb E 165 (53.2%)
   Homozygous β-thalassemia 15 (4.8%)
   Hemoglobin H 130 (42%)
Age at onset of anemia (years)
(n = 270)
3.61 (2.6)
Age at first transfusion (years)
(n = 191)
3.91 (2.8)
Receiving a blood transfusion during the previous 3 months
(n = 245)
 
   Yes 103 (42%)
   No 142 (58%)
Frequency of blood transfusion
(n = 312)
 
   None 146 (46.8%)
   Occasional (1-5 times/year) 58 (18.6%)
   Low (6-12 times/year) 77 (24.7%)
   High (13-22 times/year) 31 (9.9%)
Pre-transfusion Hb level 3 months prior to QOL assessment (g/dL)
(n = 265)
8.04 (1.2)
Serum ferritin level (ng/mL) (n = 127) 2509.9(1903.6)
Iron chelation treatment (n = 314)*  
   Yes 86 (27.4%)
   No 228 (72.6%)
Complications (n = 314)  
   Yes 19 (6.1%)
   No 295 (93.9%)
Age at onset of anemia <2 and age at first transfusion <4 years old
(n = 241)
 
   Yes 75 (31.1%)
   No 166 (68.9%)
Having a severe condition** (n = 314)  
   Yes 113 (36%)
   No 201 (64%)
  1. * Subcutaneous injection treatment
  2. ** Patients whose age at onset <2 and age at first transfusion <4 years, and/or patients diagnosed with homozygous beta-thalassemia, and/or patients with a pre-transfusion Hb level lower than 7 g/dL.