Table 2.

1- and 2-year changes in risk factors overall and for NDPP enrollees and non-enrollees, and adjusted change in risk factors among NDPP enrollees and non-enrollees.^a

	Overall	Enrollees	Non-enrollees	p-Value	N used in model	Adjusted mean change in risk factor among enrolleesa (95 % CI)	Adjusted mean change in risk factor among non-enrolleesa (95 % CI)	p-Value
Number (N)	8131	776	7355	–	–	–	–	–
One-year changes
BMI (kg/m2)	−0.2 ± 2.5	−1.2 ± 2.4	−0.1 ± 2.4	<0.001	5145	−1.1 (−1.3 to −0.8)	−0.1 (−0.3 to 0.1)	<0.001
Blood pressure (mmHg)
Systolic	0 ± 16	−2 ± 15	0 ± 16	0.002	4910	−2 (−3 to 0)	0 (−1 to 1)	0.003
Diastolic	0 ± 11	−1 ± 11	0 ± 11	0.0325	4910	−1 (−2 to 0)	0 (−1 to 1)	0.002
Lipids (mg/dl)
Total cholesterol	−2 ± 30	−6 ± 32	−1 ± 30	0.032	1952	−8 (−12 to −3)	−3 (−6 to 0)	0.022
HDL-c	0 ± 8	1 ± 8	0 ± 8	0.561	1947	1 (−1 to 2)	0 (0 to 1)	0.881
Triglycerides	−8 ± 89	−27 ± 103	−6 ± 87	0.004	1936	−30 (−42 to −18)	−10 (−18 to −2)	<0.001
LDL-c	−2 ± 26	−4 ± 25	−2 ± 26	0.091	2537	−5 (−9 to −2)	−3 (−5 to −1)	0.100
HbA1c (%)	0.0 ± 0.6	−0.1 ± 0.4	0.0 ± 0.6	<0.001	2382	−0.1 (−0.2 to 0.0)	0.0 (0.0 to 0.1)	<0.001
Two-year changes
BMI (kg/m2)	−0.1 ± 2.9	−0.6 ± 2.7	−0.1 ± 2.9	<0.001	4760	−0.5 (−0.8 to −0.2)	−0.2 (−0.4 to 0.0)	0.009
Blood pressure (mmHg)
Systolic	1 ± 16	0 ± 16	1 ± 16	0.151	4556	−1 (−2 to 1)	0 (−1 to 1)	0.084
Diastolic	−1 ± 11	−1 ± 11	0± 11	0.129	4556	−1 (−2 to 0)	0 (−1 to 0)	0.010
Lipids (mg/dl)
Total cholesterol	−1 ± 33	−2 ± 31	−1 ± 33	0.718	1536	−4 (−10 to 2)	−2 (−6 to 1)	0.586
HDL-c	1 ± 8	1 ± 7	0 ± 8	0.155	1553	1 (−1 to 3)	1 (0 to 1)	0.534
Triglycerides	−8 ± 89	−27 ± 103	−6 ± 87	0.004	1936	−30 (−42 to −18)	−10 (−17 to −2)	<0.001
LDL-c	−3 ± 28	−4 ± 28	−3 ± 29	0.302	2461	−6 (−10 to −2)	−4 (−6 to −1)	0.169
HbA1c (%)	0.1 ± 0.6	0.0 ± 0.5	0.1 ± 0.6	0.039	2293	0.0 (−0.1 to 0.1)	0.1 (0.0 to 0.1)	0.219

^aAdjusted for baseline age group, sex, race, and value of the risk factor.