. Author manuscript; available in PMC: 2018 Mar 1.

Published in final edited form as: Sch Psychol Q. 2017 Jan 12;32(1):105–117. doi: 10.1037/spq0000190

Table 1.

Univariate Correlations, Means, and Standard Deviations for a Multilevel Model of HbA1c (A1C) Values and Grade Point Average (GPA) over 2.5 Years for Adolescents with Type 1 Diabetes

Variables	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
1. T1_A1C	–
2. T2_A1C	.74^**	–
3. T3_A1C	.71^**	.64^**	–
4. T4_A1C	.58^**	.62^**	.64^**	–
5. T5_A1C	.52^**	.52^**	.59^**	.60^**	–
6. T6_A1C	.47^**	.35^**	.55^**	.45^**	.62^**	–
7. T1_GPA	−.43^**	−.44^**	−.17^*	−.22^**	−.30^**	−.22^**	–
8. T2_GPA	−.35^**	−.33^**	−.12	−.37^**	−.29^**	−.23^**	.81^**	–
9. T3_GPA	−.42^**	−.32^**	−.30^**	−.23^**	−.23^**	−.22^**	.77^**	.73^**	–
10. T4_GPA	−.46^**	−.44^**	−.25^**	−.36^**	−.28^**	−.18^*	.73^**	.84^**	.89^**	–
11. T5_GPA	−.44^**	−.46^**	−.27^**	−.35^**	−.28^**	−.25^**	.64^**	.65^**	.63^**	.76^**	–
12. T6_GPA	−.44^**	−.26^**	−.30^**	−.40^**	−.32^**	−.38^**	.64^**	.55^**	.62^**	.70^**	.64^**	–
13. Duration	.12	.09	.10	.03	−.02	−.03	−.02	.07	−.02	.06	.06	.12	–
14. Sex	−.06	.01	−.00	−.03	.01	−.02	.21^**	.24^**	.23^**	.29^**	.17^*	.13	−.04	–
15. No Pump	.28^**	.25^**	.17^*	.24^**	.18^*	.18^*	−.20^**	−.15	−.24^**	−.17^*	−.15	−.18^*	−.14^*	−.06	–
16. Age	.15^*	.09	.06	.05	.06	.02	−.30^**	−.24^**	−.32^**	−.26^**	−.22^**	−.15	.07	−.10	.01	–
17. IQ_KBIT	−.26^**	−.25^**	−.17^*	−.25^**	−.25^**	−.19^**	.40^**	.37^**	.22^**	.28^**	.27^**	.37^**	−.05	−.06	−.03	−.04	–
Mean^b	8.37	8.45	8.60	8.71	8.92	8.84	3.40	3.47	3.33	3.41	3.46	3.43	4.74	.54	.48	12.49	103.54
SD	1.58	1.54	1.75	1.72	1.64	1.59	.62	.59	.70	.67	.62	.57	2.96	.50	.50	1.53	13.36
Skewness	1.22	1.31	1.53	1.49	1.17	1.53	−1.41	−1.77	−1.73	−1.98	−1.91	−1.52	.66	−.16	.05	−.11	−.05
Kurtosis	2.24	2.59	2.45	2.04	1.29	2.68	1.91	3.81	3.98	4.90	3.96	2.62	−.63	−1.99	−2.01	−1.26	−.07

Note. n = 252.

p < .05,

^**

p < .01