Characteristic Incentive Control Test statistic p-Value
Mean length of plan membership (in months) 63 61 t(1,927)=-0.70 p=0.4867
# of emails to primary care provider (PCP) last 12 months 4.4 4.3 t(1,799)=-0.24 p=0.8077
Ever use email or Web 98% 98% χ2(1)=0.28 p=0.6416
# Visits to PCP last 12 months: χ2(6)=17.97 p=0.0063
 None <1% <1%
 1 time 23% 17%
 2 32% 33%
 3 20% 25%
 4 12% 14%
 5 to 9 12% 10%
 10 or more times <1% 1%
Mean rating of PCP (0–10) 8.8 8.8 t(1,880)=0.16 p=0.8767
Overall rating of health=excellent 16% 14% χ2(1)=1.49 p=0.2465
Gender:
 Male
 Female

41%
59%

44%
56%
χ2(1)=2.20 p=0.3023
Age:
 18–24
 25–34
 35–44
 45–54
 55–64
 65+

2%
6%
10%
19%
28%
36%

1%
4%
9%
17%
30%
39%
χ2(5)=7.08 p=0.2146
Education:
 8th grade or less
 Some high school
 diploma/GED
 some college/2 year degree
 4 year degree
 more than 4 year degree

<1%
1%
10%
37%
22%
30%

<1%
1%
11%
36%
21%
30%
χ2(5)=2.55 p=0.7688
Race and ethnicity: χ2(1)=0.02

 Hispanic 8% 8% χ2(1)=0.57 p=0.9312
 Am Indian/Alaska native 1% 1% χ2(1)=7.92 p=0.5216
 Asian 8% 5% χ2(1)=11.04 p=0.0050
 Black or Afr American 2% 4% χ2(1)=0.29 p=0.0010
 Nat Hawaiian/Pac Island <1% <1% χ2(1)=0.44 p=0.7413
 White 90% 91% p=0.5212
Had elp to complete Survey=YES 3% 2% χ2(1)=3.65 p=0.0641