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. Author manuscript; available in PMC: 2023 Feb 1.
Published in final edited form as: Mind Brain Educ. 2021 Dec 14;16(1):5–12. doi: 10.1111/mbe.12307

Table 1.

Child and teacher characteristics at baseline (T0; October 2019).

Children (n=292)
Public Schools Private Schools
School 1
(N=131)
School 2 (Control)
(N=109)
Difference statistic:
School 1 vs. School 2
School 3
(N =52)
Difference statistic:
Schools 1 & 2 vs. 3
Age, M years (SD) 7.65 (.77) 7.83 (.78) t(238)=1.8, p=.067 7.9 (.8) t(290)=1.4, p=.16
Gender, n (%) χ 2 (1)=4.13, p=.042 χ2(1)=.02, p=.89
 Female 49 (37%) 55 (50%) 22 (42%)
 Male 82 (63%) 54 (50%) 30 (58%)
Grade, n (%) χ 2 (1)=19.7, p<.001 χ 2 (2)=50.2, p<.001
 Second grade 61 (47%) 21 (19%) 20 (39%)
 Third grade 70 (53%) 88 (81%) 22 (42%)
 Fourth grade 0 0 10 (19%)
Race/ethnicity, n (%) χ2(1)=3.15, p=.68 χ 2 (5)=149.6, p<.001
 Black non-Hispanic 94 (72%) 75 (69%) 1 (2%)
 White non-Hispanic 9 (7%) 5 (5%) 38 (73%)
 Hispanic 5 (4%) 5 (5%) 1 (2%)
 Asian 8 (6%) 6 (5%) 0
 Other/prefer to not answer 15 (11%) 18 (16%) 12 (23%)
Teachers (n=17)
Public Schools Private School
School 1
(N=6)
School 2 (Control)
(N=6)
Difference statistic:
School 1 vs. School 2
School 3
(N =5)
Difference statistic:
Schools 1 & 2 vs. 3

Gender, n (%) N/A χ 2 (1)=5.4, p=.02
 Female 6 (100%) 6 (100%) 3 (60%)
 Male 0 0 2 (40%)
Grade, n (%) χ2(1)=3.4, p=.56 χ2(2)=2.6, p=.27
 Second grade 3 (50%) 2 (33%) 2 (40%)
 Third grade 3 (50%) 4 (67%) 2 (40%)
 Fourth grade 1 (20%)
Race/ethnicity, n (%) χ2(1)=1.1, p=.3 χ2(1)=.44, p=.51
 Black non-Hispanic 0 1 (17%) 0
 White non-Hispanic 6 (100%) 5 (83%) 5 (100%)
Number of children, M (SD) 25.8 (1.6) 23.5 (.55) t(10)=3.37, p=.007 17 (7.2) t(4.18)=2.29, p=.08
Overall teaching experience, n (%) χ2(3)=6.29, p=.099 χ2(4)=5.96, p=.2
 Less than 1 year 1 0 0
 1–2 years 0 1 1
 3–5 years 0 0 1
 6–10 years 0 3 1
 Over 10 years 5 2 1