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Table 5 Comparison of Mean FsIQ, VIQ, PIQ in different populations with sickle cell disease in Europe and USA

From: Intellectual function evaluation of first generation immigrant children with sickle cell disease: the role of language and sociodemographic factors

  Age years % with FsIQ<75 FSIQ VIQ PIQ % Immigrant % mother-tongue language of hosting country
USA 8.5 NR 70.8-82.8-90* 72.1-79.9-88.8* 74.1-88.1-92.9* NR NR but IQ lower in children speaking two languages at home
Armstrong 1996
USA 13.5 9 77.3-81.1-86.7* 79.9-77.1-85.3* 77.3-81.1-86.7* NR NR
Wang 2001
USA 9.5 NR 78.6-81.1** 74.1-84.6** 77.5-78.9** NR NR
Steen 2003
USA 9.75 NR 75.05-81.91-81.67* 79.59-88.73-85.60* 74.73-77.73-80.80* NR NR
Brown 2000
USA 8.2 NR 72.7-85-90.2* 74.2-84.6-93* 75.5-83.3-89* NR NR
Thompson 2003
USA 10 NR 87.15-90.33-91.22§ 89.56-94.86-92§ 86.9-87.93-91.96§ NR 100
Kral MC 2003
UK 8.73-11.58 NR 67.6-79-86.03* 73.6-85.25-89.07* 67.80-79.75-85.57* NR NR
Watkins 1998
France 5-15 30.7 83.9-82.6-86.6** 90.4-85.8-93.3** 80.6-83.5-82.3 NR NR but performed in children living in France > 2 yrs
Bernaudin 2000
UK infants NR 82.5-87.4** BIN study early language development in infants BIN measures of early language development in infants 100 BIN measures of All families spoke English, and in the majority of cases, infants were also exposed to a non-English
Hogan 2006
The Netherlands    79-80** 80-82** 80-77** NR NR
Hijmans 2010
The Netherlands 12.2 30 80 83 79 100 46 (immigrants from Netherland Antilles)
Hijmans 2011
This paper 8.9 25 86.9 84.5 91.7 100 1
  1. *Clinical stroke Silent infarct on MRI- Normal MRI; **Silent Infarct on MRI Normal MRI; § Abnormal TCD-Conditional TCD-Normal TCD, NR not reported.