|  | Period , number of institutions, number of patients | Median age at diagnosis of ITP (y) | Median age at splenectomy    (y)1 | Median delay diagnosis - splenectomy (y)2 | Median follow up (y) | Global response at    last follow- up4 | Peri- operative    bleeding(n) | OPSI | 
      
        | El Hafy et al,          2004                     Egypte | 1980 – 1996          1 institution N = 112
 | 
 NA3
 | 9.5 (6 – 16) | 0.8 (0.3 – 2.6) | 9 (5 – 16) | 45% > 100 G/L
 | NA | 0 death          2 pneumococcal sepsis hospitalized          (1 immunization,    2 prophylaxis) | 
      
        | Aronis et al,2004Greece | 1975 – 2002 
          1 institutionN = 33 | NA | 12 | 3.3 (0.6 – 14.5) | 18.8 (6 – 25) | 85% > 150 G/L
 | 2 | 1 death, septic shock(no immunization,    no prophylaxis)No sepsis | 
      
        | Donato et al,2006Italy | 1981-2005  
          1 country, 7 institutionsN = 30 | 8 | NA | 2.5 (1 – 6) | 4.9 (1 – 13) | 73% > 150 G/L
 | NA | 0 death 
          Sepsis not specified | 
      
        | Ramenghi etal, 2006Argentina | NA - 2002 
          1 country, 11 institutionsN = 90 | 8 (1.3 – 17.8) | 11.3 (2.4 – 22.4) | 2.4 ( 0.5 – 19.4) | 3.9 (0.4 – 15) | 75% > 50 G/L
 | NA | 1 death, sepsis(immunization and prophylaxis
          NA) 10 “infectious episodes” | 
      
        | Kühne et al,2007ICIS | 1997 – 2006 
          25 countries, 57institutions N = 134 | 9.5 (1.1 – 18.7) | 11.8 (2.7 – 20.7) | 1.8 (0.1 – 10.8) | 2 (0.1 – 4.5) | 69% > 150 G/L
 | 8 | 0 death 
          7 sepsis | 
      
        | Our study,2011France | 2000 – 2009 
          1 country, 16 institutions 
          N = 78 | 9.6 (0.8 – 16.5) | 12.4 (3.5 – 17.4) | 2 (0.1 – 13.5) | 3.4 (0.1 – 13.5) | 84% > 100 G/L
 51% in CCR
 | 2 | 0 death 
          No sepsis |