Table 1.

Demographic information.

OADS Sample Characteristics
N total (N females)	166 (86 F)
T1 age, y	12.79 (0.425)
T2 age, y	16.70 (0.518)
T3 age, y	19.08 (0.460)
Delay time from T1 to T2, y	3.83 (0.204)
Delay time from T2 to T3, y	2.38 (0.219)
Estimated FSIQ	107.86 (15.60)
IRSD	37.07 (26.69)
Maternal positivity during PSI	1.71 (0.62)
DNCYr12, N/total N (%)	21/127 (16.5)

Unless otherwise stated, values represent mean and standard deviation (in parentheses).

Abbreviations: DNCYr12, did not complete year 12/senior year school; FSIQ, full-scale IQ; IRSD, Index of Relative Socioeconomic Disadvantage (neighborhood disadvantage (scale 1-100, with higher scores indicating relatively more disadvantage)); See Supplementary Figure S1 for the distribution of IRSD; PSI, problem-solving interaction; T1, time 1; T2, time 2; T3, time 3. The sample included in the present study did not differ from the original sample in key demographic characteristics (age [at baseline], sex, and neighborhood disadvantage, p > .5)