Table 1.
Participant characteristics at the 10-month and 3-year laboratory visits.
| 10-Month Visit | ||||
|---|---|---|---|---|
| FH-ADHD | FH-ADHD and ASD |
FH-ASD | FH-No ADHD/ASD | |
| N | 27 | 20 | 77 | 27 |
| Age (days) M (SD) | 324 (28) | 320 (15) | 320 (15) | 322 (17) |
| Range | 278–384 | 300–354 | 287–357 | 293–358 |
| Sex | 12 female | 8 female | 38 female | 11 female |
| 15 male | 12 male | 39 male | 16 male | |
| Highest education level of primary caregiver a | 8 Secondary 10 Undergraduate 9 Postgraduate |
11 Secondary 6 Undergraduate 2 Postgraduate |
1 Primary 18 Secondary 38 Undergraduate 18 Postgraduate |
2 Secondary 10 Undergraduate 14 Postgraduate |
| MSEL ELC b | ||||
| M (SD) | 85.04 (15.61) | 84.90 (16.55) | 88.03 (15.09) | 88.89 (12.19) |
| Range | 61–128 | 59–134 | 50–136 | 58–114 |
| 3-Year Visit | ||||
| FH-ADHD | FH-ADHD and ASD |
FH-ASD | FH-No ADHD/ASD | |
| N c | 21 | 14 | 57 | 21 |
| Age (months) | ||||
| M (SD) | 37.42 (2.93) | 37.21 (1.63) | 37.00 (1.17) | 36.83 (1.82) |
| Range | 36–49 | 36–41 | 36–42 | 35–43 |
| Sex | 9 female | 4 female | 30 female | 9 female |
| 12 male | 10 male | 27 male | 12 male | |
| Highest education level of primary caregiver d | 5 Secondary 8 Undergraduate 8 Postgraduate |
7 Secondary 4 Undergraduate 2 Postgraduate |
1 Primary 14 Secondary 29 Undergraduate 11 Postgraduate |
1 Secondary 7 Undergraduate 12 Postgraduate |
| MSEL ELC | ||||
| M (SD) | 118.58 (20.37) | 106.00 (20.65) | 107.27 (19.24) | 129.94 (11.41) |
| Range e | 66–144 | 65–131 | 75–141 | 109–146 |
a Data missing for 4 participants (2 FH-ASD; 1 FH-No ADHD/ASD; 1 FH-ADHD and ASD). b Further information regarding MSEL administration is provided in SM3. Data is missing for one participant in the FH-ADHD group, and one participant in the FH-ASD group. c Demographics at 3 years are presented only for participants who had both valid data at the 10-month time point and data on the ADHD subscale of the CBCL at 3 years. Data at 3 years also includes three children with a half-sibling with ADHD. These infants were not included in the primary 10-month analyses due to not meeting eligibility criteria for the FH-ADHD group or the FH-No ADHD/ASD group. However, they were included in the longitudinal analyses. For these participants at 3 years, Age M (SD) = 37.33 (2.31); Sex = 3 male; Highest education of primary caregiver = 3 Secondary; MSEL ELC M (SD) = 99.67 (44.29). d Data missing for 4 participants (2 FH-ASD; 1 FH-No ADHD/ASD; 1 FH-ADHD and ASD). Data was collected at the 10-month timepoint. e Data missing for 11 participants (2 FH-ADHD; 6 FH-ASD; 3 FH-No ADHD/ASD). MSEL; Mullen Scales of Early Learning. The MSEL (Mullen, 1995) is a standardized measure that assesses developmental abilities across five subscales including: Fine Motor, Gross Motor, Visual Reception, Receptive Language and Expressive Language. FH, Family History; ADHD, Attention Deficit Hyperactivity Disorder; ASD, Autism Spectrum Disorder; ELC, Early Learning Composite.