Table 1

Symptom frequency

SymptomMild MR (n = 9)Severe MR (n = 40)Total (n = 49)
Sleep problems
 At least one symptom3 (33)24(60)27 (55)
 Three or more symptoms012 (30)12(24)
Current GI symptoms
 At least one symptom4 (44)29 (73)33 (67)
 All three symptoms04 (10)4 (8)
Hyperactivity
 Any one symptom3 (33)33 (83)1-160 36 (74)
 All four symptoms07 (18)7 (14)
Self injury
 Occurring at least occasionally2 (22)25 (64)1-150 27 (56)
 Severe1 (11)10 (26)11 (23)
Aggression
 Occurring at least occasionally6 (67)29 (76)35 (75)
 Occurring daily3 (33)20 (53)23 (49)
  • Figures in parenthesis are percentages of those with mild or severe mental retardation (MR).

  • 1-150 p < 0.05;

  • 1-160 p < 0.01.

  • GI, gastrointestinal.