Table 1.
Sample Characteristics, 2015 to 2017 National Health Interview Survey
| Age group | P | ||||
|---|---|---|---|---|---|
| Age 18–64 years | Age 65+ years | ||||
| No. | Weighted % | No. | Weighted % | ||
| Total | 68,828 | 100.0 | 24,614 | 100.0 | – |
| Current age | – | ||||
| 18–34 | 23,281 | 37.1 | – | – | |
| 35–44 | 14,011 | 20.5 | – | – | |
| 45–54 | 15,079 | 21.5 | – | – | |
| 55–64 | 16,457 | 20.9 | – | – | |
| 65–74 | – | – | 14,033 | 59.2 | |
| 75+ | – | – | 10,581 | 40.8 | |
| Sex | < .0001 | ||||
| Male | 31,870 | 49.1 | 10,288 | 44.6 | |
| Female | 36,958 | 50.9 | 14,326 | 55.4 | |
| Race/ethnicity | < .0001 | ||||
| Non-Hispanic white | 43,717 | 61.2 | 18,858 | 77.1 | |
| Non-Hispanic black | 8385 | 12.5 | 2475 | 8.8 | |
| Hispanic | 10,754 | 17.6 | 1887 | 8.2 | |
| Asian and other | 5972 | 8.7 | 1394 | 5.9 | |
| Current marital status | < .0001 | ||||
| Married/living as married | 30,832 | 52.1 | 10,482 | 55.9 | |
| Other | 37,996 | 47.9 | 14,132 | 44.1 | |
| Educational attainment | < .0001 | ||||
| < High school graduate | 9738 | 14.4 | 4895 | 18.9 | |
| High school graduate | 13,955 | 20.9 | 6355 | 25.7 | |
| Some college or more | 45,135 | 64.7 | 13,364 | 55.3 | |
| Family income as % of FPL | < .0001 | ||||
| < 200% | 22,630 | 28.8 | 7516 | 25.8 | |
| 200–399% | 17,611 | 25.9 | 7210 | 29.0 | |
| > 400% | 25,047 | 39.5 | 7333 | 34.4 | |
| Missing | 3540 | 5.8 | 2555 | 10.9 | |
| Current insurance status* | – | ||||
| 18–64 years, private only | 46,485 | 69.1 | – | – | |
| 18–64 years, some public | 13,413 | 18.0 | – | – | |
| 18–64 years, uninsured | 8930 | 12.9 | – | – | |
| 65+ years, Medicare + private | – | – | 11,243 | 47.1 | |
| 65+ years, Medicare + public | – | – | 3764 | 14.8 | |
| 65+ years, Medicare only | – | – | 8523 | 38.1 | |
| Condition count† | < .0001 | ||||
| 0 | 32,924 | 49.8 | 2527 | 10.3 | |
| 1 | 17,954 | 26.2 | 4482 | 18.0 | |
| 2 | 9295 | 12.8 | 5810 | 23.8 | |
| 3+ | 8655 | 11.2 | 11,795 | 47.9 | |
| Prescription drug in the past 12 months‡ | < .0001 | ||||
| Yes | 40,959 | 57.6 | 21,015 | 85.6 | |
| No | 27,869 | 42.4 | 3599 | 14.4 | |
| Survey year | 0.1275 | ||||
| 2015 | 25,294 | 33.2 | 8378 | 32.3 | |
| 2016 | 24,126 | 33.4 | 8902 | 33.3 | |
| 2017 | 19,408 | 33.4 | 7334 | 34.4 | |
N = 93,442. Data from the 2015–2017 National Health Interview Survey. P values were derived from chi-square test. Italics type indicates statistical significance
FPL, federal poverty level; CI, confidence interval
*Individuals aged 65+ years with no insurance coverage, other insurance type, or missing were not shown in the current insurance status. Public insurance included Medicare, Medicaid, and/or other government/public coverage
†The number of chronic conditions was defined as the sum of the following conditions that a respondent was ever told by a doctor or other health professional that s/he had arthritis, asthma, diabetes, emphysema, coronary heart disease, hypertension, stroke, angina pectoris, heart attack, high cholesterol, and cancer. Nonmelanoma skin cancer was not counted as a condition. Any cancer was measured as a single condition
‡The medication prescribed status was measured by the yes/no question: During the past 12 months, were you prescribed medication by a doctor or other health professional?