Overall, 22.8% of survivors reported problems with task efficiency, 12.4% with memory, 12.7% with organization, and 12.3% emotional regulation (Table 2). Approximately 20% to 30% of survivors who had at least one moderate chronic condition reported impairments in task efficiency and memory. Exploratory analysis revealed that risk of impairment in task efficiency, memory, and emotional regulation was associated with growth hormone deficiency, gonadal dysfunction, and marginally for hypothyroidism (Supplementary Table 3, available online).

Table 2.

Neurocognitive function by grade of chronic health condition

Chronic health condition (grade)No.Neurocognitive domain
Task efficiency
Memory
Organization
Emotional regulation
Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*
All survivors550753.3 (12.9)†22.851.7 (11.9)†12.449.7 (10.1)†12.751.8 (10.8)†12.3
Cardiovascular
  None416753.0 (12.8)21.851.3 (11.7)12.749.5 (10.0)12.051.6 (10.8)11.8
  Mild (1)43054.4 (13.5)26.053.0 (12.3)15.650.8 (10.5)15.652.8 (11.1)14.9
  Moderate (2)71753.9 (13.3)25.052.7 (12.2)14.250.1 (10.1)14.452.4 (10.9)13.2
  Severe/life-threatening (3/4)19355.5 (12.4)29.054.0 (12.2)19.751.5 (10.6)16.653.7 (10.3)13.0
Endocrine
  None401752.4 (12.3)20.751.0 (11.5)11.949.5 (10.1)12.251.2 (10.7)11.1
  Mild (1)23057.7 (15.3)35.255.5 (13.2)22.251.1 (10.5)17.853.9 (11.2)17.4
  Moderate (2)77256.1 (14.2)29.053.4 (12.6)17.150.2 (9.9)12.753.0 (10.8)14.0
  Severe/life-threatening (3/4)48854.0 (12.9)24.452.8 (12.6)15.850.3 (10.1)14.353.8 (11.1)16.8
Pulmonary
  None454752.8 (12.6)21.851.3 (11.6)12.449.4 (10.0)11.851.5 (10.7)11.2
  Mild (1)86855.3 (13.8)26.853.3 (12.7)17.651.1 (10.4)16.853.4 (11.3)16.5
  Moderate (2)3252.9 (9.5)18.853.6 (11.6)12.552.7 (10.1)15.652.0 (11.9)15.6
  Severe/life-threatening (3/4)6060.1 (15.1)38.357.9 (14.8)28.352.4 (9.9)18.357.0 (11.3)26.7
Chronic health condition (grade)No.Neurocognitive domain
Task efficiency
Memory
Organization
Emotional regulation
Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*
All survivors550753.3 (12.9)†22.851.7 (11.9)†12.449.7 (10.1)†12.751.8 (10.8)†12.3
Cardiovascular
  None416753.0 (12.8)21.851.3 (11.7)12.749.5 (10.0)12.051.6 (10.8)11.8
  Mild (1)43054.4 (13.5)26.053.0 (12.3)15.650.8 (10.5)15.652.8 (11.1)14.9
  Moderate (2)71753.9 (13.3)25.052.7 (12.2)14.250.1 (10.1)14.452.4 (10.9)13.2
  Severe/life-threatening (3/4)19355.5 (12.4)29.054.0 (12.2)19.751.5 (10.6)16.653.7 (10.3)13.0
Endocrine
  None401752.4 (12.3)20.751.0 (11.5)11.949.5 (10.1)12.251.2 (10.7)11.1
  Mild (1)23057.7 (15.3)35.255.5 (13.2)22.251.1 (10.5)17.853.9 (11.2)17.4
  Moderate (2)77256.1 (14.2)29.053.4 (12.6)17.150.2 (9.9)12.753.0 (10.8)14.0
  Severe/life-threatening (3/4)48854.0 (12.9)24.452.8 (12.6)15.850.3 (10.1)14.353.8 (11.1)16.8
Pulmonary
  None454752.8 (12.6)21.851.3 (11.6)12.449.4 (10.0)11.851.5 (10.7)11.2
  Mild (1)86855.3 (13.8)26.853.3 (12.7)17.651.1 (10.4)16.853.4 (11.3)16.5
  Moderate (2)3252.9 (9.5)18.853.6 (11.6)12.552.7 (10.1)15.652.0 (11.9)15.6
  Severe/life-threatening (3/4)6060.1 (15.1)38.357.9 (14.8)28.352.4 (9.9)18.357.0 (11.3)26.7
*

Percent impaired, defined as a score falling in the top 10th percentile of the sibling reference (ie, T score ≥ 63).

Group mean (standard deviation) standardized T-score (μ = 50, σ = 10) for each neurocognitive domain. A higher T-score is indicative of more neurocognitive problems.

Table 2.

Neurocognitive function by grade of chronic health condition

Chronic health condition (grade)No.Neurocognitive domain
Task efficiency
Memory
Organization
Emotional regulation
Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*
All survivors550753.3 (12.9)†22.851.7 (11.9)†12.449.7 (10.1)†12.751.8 (10.8)†12.3
Cardiovascular
  None416753.0 (12.8)21.851.3 (11.7)12.749.5 (10.0)12.051.6 (10.8)11.8
  Mild (1)43054.4 (13.5)26.053.0 (12.3)15.650.8 (10.5)15.652.8 (11.1)14.9
  Moderate (2)71753.9 (13.3)25.052.7 (12.2)14.250.1 (10.1)14.452.4 (10.9)13.2
  Severe/life-threatening (3/4)19355.5 (12.4)29.054.0 (12.2)19.751.5 (10.6)16.653.7 (10.3)13.0
Endocrine
  None401752.4 (12.3)20.751.0 (11.5)11.949.5 (10.1)12.251.2 (10.7)11.1
  Mild (1)23057.7 (15.3)35.255.5 (13.2)22.251.1 (10.5)17.853.9 (11.2)17.4
  Moderate (2)77256.1 (14.2)29.053.4 (12.6)17.150.2 (9.9)12.753.0 (10.8)14.0
  Severe/life-threatening (3/4)48854.0 (12.9)24.452.8 (12.6)15.850.3 (10.1)14.353.8 (11.1)16.8
Pulmonary
  None454752.8 (12.6)21.851.3 (11.6)12.449.4 (10.0)11.851.5 (10.7)11.2
  Mild (1)86855.3 (13.8)26.853.3 (12.7)17.651.1 (10.4)16.853.4 (11.3)16.5
  Moderate (2)3252.9 (9.5)18.853.6 (11.6)12.552.7 (10.1)15.652.0 (11.9)15.6
  Severe/life-threatening (3/4)6060.1 (15.1)38.357.9 (14.8)28.352.4 (9.9)18.357.0 (11.3)26.7
Chronic health condition (grade)No.Neurocognitive domain
Task efficiency
Memory
Organization
Emotional regulation
Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*Mean (SD)% impaired*
All survivors550753.3 (12.9)†22.851.7 (11.9)†12.449.7 (10.1)†12.751.8 (10.8)†12.3
Cardiovascular
  None416753.0 (12.8)21.851.3 (11.7)12.749.5 (10.0)12.051.6 (10.8)11.8
  Mild (1)43054.4 (13.5)26.053.0 (12.3)15.650.8 (10.5)15.652.8 (11.1)14.9
  Moderate (2)71753.9 (13.3)25.052.7 (12.2)14.250.1 (10.1)14.452.4 (10.9)13.2
  Severe/life-threatening (3/4)19355.5 (12.4)29.054.0 (12.2)19.751.5 (10.6)16.653.7 (10.3)13.0
Endocrine
  None401752.4 (12.3)20.751.0 (11.5)11.949.5 (10.1)12.251.2 (10.7)11.1
  Mild (1)23057.7 (15.3)35.255.5 (13.2)22.251.1 (10.5)17.853.9 (11.2)17.4
  Moderate (2)77256.1 (14.2)29.053.4 (12.6)17.150.2 (9.9)12.753.0 (10.8)14.0
  Severe/life-threatening (3/4)48854.0 (12.9)24.452.8 (12.6)15.850.3 (10.1)14.353.8 (11.1)16.8
Pulmonary
  None454752.8 (12.6)21.851.3 (11.6)12.449.4 (10.0)11.851.5 (10.7)11.2
  Mild (1)86855.3 (13.8)26.853.3 (12.7)17.651.1 (10.4)16.853.4 (11.3)16.5
  Moderate (2)3252.9 (9.5)18.853.6 (11.6)12.552.7 (10.1)15.652.0 (11.9)15.6
  Severe/life-threatening (3/4)6060.1 (15.1)38.357.9 (14.8)28.352.4 (9.9)18.357.0 (11.3)26.7
*

Percent impaired, defined as a score falling in the top 10th percentile of the sibling reference (ie, T score ≥ 63).

Group mean (standard deviation) standardized T-score (μ = 50, σ = 10) for each neurocognitive domain. A higher T-score is indicative of more neurocognitive problems.

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