Table 1.
Survey and older adult population characteristics for three leading surveillance systems in the United States
| NHANES | NHIS | BRFSS | |
|---|---|---|---|
| Year | 2011–2012 | 2013 | 2013 |
| Total (N) | 1166 | 7590 | 139,724 |
| Response rate | 72.6% | 75.7% | 37.8–49.4%* |
| Contact method | In-person interview | In-person interview | Telephone |
|
| |||
| Stratified groups | N (weighted %) | ||
|
| |||
| Age | |||
| 65–74 years | 637 (57.4) | 4274 (57.6) | 79,282 (57.3) |
| 75–84 years | 529 (42.6) | 2317 (30.4) | 60,442 (42.7) |
| 85+ years | NA (NA) | 999 (12.0) | NA (NA) |
| Gender | |||
| Male | 581 (44.1) | 3053 (44.1) | 51,560 (43.5) |
| Female | 585 (55.9) | 4537 (55.9) | 88,164 (56.5) |
| Race/Ethnicity | |||
| Non-Hispanic White | 565 (77.9) | 5368 (78.8) | 118,000 (77.4) |
| Non-Hispanic Black | 284 (8.5) | 1001 (8.4) | 8527 (8.6) |
| Hispanic or Latino | 178 (7.1) | 752 (7.6) | 5588 (7.6) |
| Other | 139 (6.5) | 469 (5.2) | 7609 (6.3) |
| Functional Limitations | |||
| Yes | 560 (42.8) | 4880 (63.3) | 43,313 (29.6) |
| No | 606 (57.2) | 2710 (36.7) | 95,451 (69.5) |
Note: N’s are for those with available physical activity data
*
response rates were 37.8% for cell-phone and 49.4% for landline.
NA’s for age group 85+ yrs are due to top-coding of variables at age 80yrs.
Sub-categories may not equal 100 due to missing values or rounding. For race/ethnicity, there was an “other” category that was included in models as a covariate, but no estimated separately due to small samples and unreliable estimates. Categories not equal to 100 are due to missing values or rounding.