Table 1:
Unweighted Summary Statistics of Analytic Samples at First Observation
| Full Sample | Walking Speed Subsample | |||
|---|---|---|---|---|
| Mean (SD) or Percent | Percent Missing | Mean (SD) or Percent | Percent Missing | |
| Demographics | ||||
| Age (years) | 63.2 (10.8) | 0 % | 73.8 (7.1) | 0 % |
| Female | 56.6 % | 0 % | 57.89 % | 0 % |
| Race/Ethnicity | 0 % | 0 % | ||
| White | 69.87 % | 77.56 % | ||
| Black | 18.27 % | 13.68 % | ||
| Latino | 11.86 % | 8.76 % | ||
| Married | 63.38 % | 0.1% | 59.42 % | 0.02 % |
| Foreign-born | 11.4 % | 0.05 % | 8.96 % | 0.07 % |
| Died in follow-up period | 39.07 % | 0 % | 33.95 % | 0 % |
| Mean follow-up (years) | 11.2 (5.9) | 0 % | 6.9 (3.3) | 0 % |
| Socioeconomic Characteristics | ||||
| Education (years) | 12.2 (3.4) | 0.28 % | 12.3 (3.2) | 0.04 % |
| Household income | $58,000 ($98,900) | 0 % | $55,200 ($119,400) | 0 % |
| Household wealth | $309,900 ($1,044,000) | 0 % | $521,000 ($1,205,000) | 0 % |
| Health Characteristics | ||||
| Often troubled by pain | 30.3 % | 0.11 % | 34.19 % | 0.08 % |
| Ever smoked | 58.13 % | 0.45 % | 57.34 % | 0.45 % |
| Ever diagnosed with arthritis | 43.82 % | 0.10 % | 66.08 % | 0.10 % |
| Ever diagnosed with diabetes | 14.33 % | 0.08 % | 22.75 % | 0.14 % |
| Ever diagnosed with high blood pressure | 43.74 % | 0.1 % | 62.48 % | 0.15 % |
| Ever had a stroke | 6.28 % | 0.05 % | 9.74 % | 0.10 % |
| Obese at maximum weight | 46.44 % | 18.59 % | 46.04 % | 1.23 % |
| Number of limitations | 2.7 (3.1) | 0.89 % | 3.3 (3) | 0.41 % |
| Fair/poor self-rated health | 31.27 % | 0 % | 29.26 % | 0 % |
| Walking speed (meters/second) | 0.8 (0.3) | 0 % | ||
| Unable to perform walking speed task | 7.19 % | 0 % | ||
| Number of respondents | 30,494 | 11,857 | ||
| Number of observations | 160,647 | 39,835 | ||
Notes: Means and percentages are defined for respondents not missing the variable. These statistics refer to the first observation of a respondent in the sample.