Table 4.

Key Variable Distributions by Data-Collection Mode and Case Flow

Data-collection mode	Case flow				p-value
	Phone-first		Mail-first
	Percent	CI	Percent	CI
CATI
N	657		370
Eligibility rate	43.0	40.1–45.8	57.1	53.2–61.0	< 0.0001
High school education or less	54.2	50.3–58.0	57.9	52.8–63.0	0.2243
Age (mean)	56.4	55.0–57.7	55.6	53.7–57.4	0.4808
Household income below $35k	59.5	55.6–63.5	70.0	65.1–74.9	0.0016
Diabetes	23.5	20.2–26.8	23.8	19.3–28.2	0.9191
BMI (mean)	29.7	29.1–30.2	30.5	29.7–31.3	0.0877
Fruit servings per day (mean)	3.7	3.6–3.9	3.7	3.5–4.0	0.9654
SAQ
N	609		1,183
Eligibility rate	42.7	39.3–46.1	37.4	35.0–39.8	0.0123
High school education or less	46.9	42.9–50.9	46.7	43.8–49.6	0.9129
Age (mean)	52.9	51.6–54.2	53.6	52.7–54.6	0.3661
Household income below $35k	56.4	52.3–60.5	61.5	58.6–64.3	0.0480
Diabetes	21.1	17.7–24.5	22.2	19.7–24.6	0.6273
BMI (mean)	30.5	30.0–31.0	29.9	29.5–30.3	0.0664
Fruit servings per day (mean)	3.8	3.5–4.1	3.8	3.6–4.0	0.7876
Combined
N	1,266		1,537
Eligibility rate	42.8	40.7–45.0	42.3	40.2–44.4	0.7277
High school education or less	50.3	47.5–53.0	49.7	47.2–52.2	0.6887
Age (mean)	54.5	53.6–55.5	54.0	53.2–54.9	0.4247
Household income below $35k	57.8	55.0–60.6	63.3	60.8–65.8	0.0052
Diabetes	22.2	19.8–24.5	22.4	20.2–24.6	0.8754
BMI (mean)	30.1	29.7–30.3	30.0	29.6–30.3	0.6085
Fruit servings per day (mean)	3.8	3.6–3.9	3.8	3.6–3.9	0.9135