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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: J Adolesc Health. 2012 Aug 27;52(2):186–194. doi: 10.1016/j.jadohealth.2012.06.019

Table 3.

School outcomes by socio-demographics and pubertal status.

School Outcome Overall Female vs.
Male
6th–8th vs.
4th–5th
grade
Lower Income
(<$40,000)
vs Higher Income
($40,000+)
Black vs.
White
Low Maternal
Education vs
College
Degree or
Higher
Puberty
Complete vs. Not
Complete
Mean
(range)
Difference in means, (p-value)
Days absent during school
year
9.7
(0–73)
2.7
(<0.001)
−1.4
(0.002)
2.5
(<0.001)
1.4
(<0.001)
Teacher Connectedness 4.02
(1–5)
0.07
(0.012)
−0.12
(0.008)
−0.08
(0.031)
−0.09
(<0.001)
Student Engagement 2.84
(1–5)
0.31
(<0.001)
−0.27
(<0.001)
0.14
(0.003)
−0.13
(<0.001)
Grade Point Average 2.91
(0–4)
0.31
(<0.001)
−0.22
(0.005)
−0.44
(<0.001)
−0.41
(<0.001)
−0.40
(<0.001)
−0.12
(<0.001)
State Standardized
Achievement Test
101.6
(5.6–178.1)
2.7
(<0.001)
Not
applicable
−9.8
(<0.001)
−11.7
(<0.001)
−8.6
(<0.001)

(1) Linear mixed effects models with random intercepts for children nested within schools and an AR(1) correlation structure were used to estimate differences in means and associated p-values. The p-value estimates were comparable between mixed effects and marginal models.

(2) Positive values indicate that the first group had a higher level of the learning asset or academic achievement outcome, and vice versa.