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Table 4 Comparison of mean (±SD) number of days of school absence of subjects and controls according to sex

From: Determinants of academic performance in children with sickle cell anaemia

Days absent from school
  Subjects Controls  
  No. Mean (SD) No. Mean (SD) t df p
Males 55 15.00 (9.10)* 55 7.44 (7.41)** 4.782 108 0.000
Females 35 17.18 (16.18)* 35 8.14 (9.46)** 2.853 68 0.006
All pupils 90 15.85 (12.30) 90 7.71 (8.22)** 5.217 155 0.000
  1. *t = 0.819, p = 0.415; **t = 0.396, p = 0.693.