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. Author manuscript; available in PMC: 2016 Jan 30.
Published in final edited form as: Psychiatry Res. 2014 Nov 14;231(1):77–86. doi: 10.1016/j.pscychresns.2014.10.015

Table 1.

Demographic information, clinical variables, and current medication usage for the total LAMS sample and comparisons of those included versus excluded from neuroimaging.

Total LAMS Sample Included Participants Excluded Participants Statistic Comparing Included vs Excluded Participants
N=121
M(SD/Range) or Proportion		 N=42
M(SD/Range) or Proportion		 N=79
M(SD/Range) or Proportion
Demographic Information P value
Age (years) 13.65(2.05/9.89–17.17) 14.32(2.32/9.89–17.71) 13.30(1.81/9.99–17.07) t=−2.45 0.017*
IQ 101.28(16.44/70–140) 97.31(16.96/70–137) 103.39(15.86/71–140) t=−1.96 0.052
SES (maternal education) χ2=1.96 0.580
 HS Diploma or less 39/121 13/42 26/79
 Some post-HS 27/121 9/42 18/79
 Associate’s Degree 32/121 14/42 18/79
 Bachelor’s Degree or higher 23/121 6/42 17/79
Sex (males) 75/121 24/42 51/79 χ2=0.64 0.424
Clinical Measures
PGBI-10M 5.97(6.12/0–24) 4.18(4.33/0–18) 6.91(6.72/0–24) t=−2.72 0.008**
K-DRS 3.68(4.51/0–24) 3.86(5.29/0–24) 3.58(4.07/0–20) t=−0.32 0.751
K-MRS 4.22(6.44/0–28) 3.07(6.10/0–24) 4.83(6.57/0–28) t=−1.44 0.152
SCARED 11.37(10.94/0–53) 10.93(11.01/0–46) 11.60(10.97/0–53) t=−0.32 0.749
Current Medication Use
Antidepressant 18/121 3/42 15/79 χ2=3.04 0.081
Antipsychotic 25/121 7/42 18/79 χ2=0.63 0.429
Benzodiazepine 2/121 1/42 1/79 1.00
Mood Stabilizer 10/121 4/42 6/79 0.737
Non-stimulant1 9/121 2/42 7/79 0.494
Stimulant 45/121 11/42 34/79 χ2=3.33 0.068

Abbreviations: GED=general education development test; HS=high school; IQ=intelligence quotient Wechsler Intelligence test; K-DRS= Kiddie Schedule for Affective Disorders and Schizophrenia for School-Age Children Present Episode Depression Rating Scale; K-MRS=Kiddie Schedule for Affective Disorders and Schizophrenia for School-Age Children Mania Rating Scale; M=mean; N=sample size; P=probability value; PGBI-10M=Parent General Behavior Inventory 10 Item Mania Scale; SCARED=Screen for Child Anxiety Related Emotional Disorders (child rating); SD=standard deviation; SES=socio-economic status; t=t-test statistical value; χ2=chi-squared test statistic value.

1

Non-stimulant ADHD medications included both prescription and non-prescription medications and supplements (Intuniv, Brightspark, etc.).