TABLE 4.

Means/percents and standard errors (SE) for the covariates from the time-to-treatment model in the HCHCS/SOL analysis for the full analytic sample, the untreated subgroup without IP weights, and the untreated subgroup with IP weights

	Analytic Samplea		Exclude Treatedb		IPW Proposedc
Covariate	Mean/Percent	SE	Mean/Percent	SE	Mean/Percent	SE
Systolic blood pressure	116.67	0.25	114.55	0.24	116.20	0.29
Diastolic blood pressure	70.96	0.20	69.74	0.20	70.74	0.22
Age	37.82	0.25	36.14	0.23	37.44	0.26
Gender (%)	49.53	0.74	49.68	0.79	49.68	0.79
Hispanic/Latino background (%)
Dominican	9.03	0.75	8.76	0.75	8.98	0.75
Central American	8.19	0.77	8.38	0.81	8.40	0.80
Cuban	17.55	1.51	16.61	1.47	17.25	1.53
Mexican	41.42	1.73	42.67	1.76	41.47	1.73
Puerto Rican	14.06	0.81	13.40	0.82	14.06	0.86
South American	4.97	0.42	5.14	0.46	5.02	0.43
Multiple/other	4.77	0.42	5.05	0.46	4.82	0.43
US born (%)	24.91	0.97	26.70	1.04	25.48	1.01
Years in the US	18.69	0.32	18.19	0.32	18.71	0.34
Meets 2008 activity level guidelines (%)	70.00	0.80	71.13	0.82	70.38	0.83
Usual daily sodium intake	3416.75	23.15	3440.27	23.87	3421.49	24.20
Usual daily potassium intake	2499.65	12.90	2496.94	13.92	2495.33	13.35
Usual daily energy intake	2027.61	10.28	2045.72	11.01	2032.75	10.71
Alternative Healthy Eating Index 2010	47.34	0.18	47.13	0.19	47.26	0.18
Education (%)
No high school diploma/GED	30.31	0.91	29.12	0.96	29.62	0.98
At most high school diploma/GED	29.01	0.79	29.73	0.85	29.36	0.85
Greater than high school diploma/GED	40.68	1.02	41.15	1.09	41.02	1.08
Income (%)
< $30,000	60.66	1.09	59.76	1.16	60.52	1.15
$30,000+	33.73	1.14	34.61	1.19	33.96	1.16
Missing	5.61	0.43	5.63	0.47	5.52	0.46
Marital status (%)
Single	37.71	0.96	39.72	1.03	38.21	0.98
Married or living with a partner	49.45	1.05	49.15	1.09	49.32	1.05
Separated, divorced, or widow(er)	12.85	0.57	11.13	0.52	12.47	0.60
Health insurance coverage (%)	46.48	1.10	45.50	1.15	46.29	1.15
Current smoker (%)	20.19	0.72	19.65	0.77	20.19	0.79
Body mass index (BMI) (%)
Underweight/normal weight (BMI < 25 kg/m2)	25.67	0.79	27.31	0.86	25.98	0.82
Overweight (25 kg/m2 ≥ BMI < 30 kg/m2)	37.45	0.81	37.20	0.83	37.22	0.82
Obese (BMI ≥ 30 kg/m2)	36.88	0.84	35.50	0.91	36.80	0.92
Diabetes (%)	8.85	0.39	6.63	0.36	8.01	0.46
Chronic kidney disease (stage 2 – 5) (%)	39.77	0.85	37.74	0.91	39.57	0.93
Total cholesterol (mg/dL)	193.34	0.73	191.28	0.79	193.20	0.80
Family history of coronary heart disease (%)	24.37	0.74	22.43	0.77	24.13	0.81
Fasting glucose (mg/dL)	98.60	0.45	96.53	0.39	97.54	0.44
Employment status (%)
Retired and not currently employed	4.04	0.28	2.84	0.25	3.62	0.33
Not retired and not currently employed	40.66	0.88	40.74	0.92	40.48	0.93
Employed part-time	18.55	0.61	19.18	0.67	18.76	0.65
Employed full-time	36.75	0.82	37.24	0.87	37.14	0.87
Frequency of doctor visits in past year (%)
None	35.15	0.91	36.10	0.99	35.45	0.98
Once	18.63	0.69	19.12	0.74	18.69	0.72
2–3 times	23.73	0.76	23.82	0.81	23.72	0.81
> 3 times	22.49	0.69	20.96	0.70	22.14	0.74
High total cholesterol	38.28	0.80	36.56	0.86	38.13	0.86
History of cardiovascular disease (%)	3.10	0.30	2.71	0.33	3.10	0.39
Any pregnancy history (%)	40.82	0.72	39.82	0.77	40.62	0.78

NOTE: All values weighted for study design and non-response at follow-up (i.e., weighted by the study sampling weights).

^aBased on entire analytic sample. The purpose of the IP weights is to re-weight the untreated subgroup to resemble this sample.

^bBased on the untreated subgroup only, without applying the IP weights.

^cBased on the untreated subgroup only, weighted by the product of the sampling weights and the proposed IP weights.