Skip to main content
. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: Dev Psychol. 2012 Oct 1;49(8):1591–1601. doi: 10.1037/a0030223

Table 1.

Descriptive Statistics and Sample Ranges for Outcome, Key Predictor, and Control Variables by Assessment

T1 T2 T3 Other

Mean/% (SD) Range Mean/% (SD) Range Mean/% (SD) Range Mean/% (SD) Range
Outcome Variables
 Child Reported Depression Symptoms (CDI) 7.90 (6.14) 0–33 7.15 (6.67) 0–32 4.85 (5.19) 0–31
 Child Reported Anxiety 11.52 (6.93) 0–28 9.84 (7.14) 0–26 7.64 (6.83) 0–28
 Child Reported Anger/Aggression 5.34 (5.36) 0–27 4.14 (4.23) 0–19 3.72 (3.65) 0–17
Predictor Variables
 Sleepiness 15.67 (5.00) 9–31 14.21 (4.73) 2–34 13.66 (4.20) 9–33
 Sleepiness Intercept 15.54 (4.85) 7.5–31.17
 Sleepiness Slope −.946 (3.41) −13–18
 Sleep/Wake Problems 18.78 (6.02) 9–42 19.79 (7.58) 10–48 17.87 (6.01) 10–36
 Sleep/Wake Problems Intercept 19.15 (5.73) 9–44.3
 Sleep/Wake Problems Slope −.312 (3.92) −14–21
Moderator & Control Variables
 Sex (boys) 49.00% 0–1 48.85% 0–1 48.85% 0–1
 Ethnicity (African American) 35.46% 0–1 35.94% 0–1 35.94% 0–1
 Socioeconomic Status 37.38 (9.92) 12–66 37.73 (10.03) 19–66 37.87 (10.40) 11–66
 Child Age (in Months) 98.71 (8.64) 80–128 111.70 (9.46) 91–143 123.30 (11.99) 87–219
 Puberty Status 1.39 (.33) 1–2.4 1.56 (.44) 1–4 1.72 (.56) 1–3.8