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| Category | Abbreviation | Question | Definition of healthy |
|
| Not hospitalized | HOSP | “Did you stay overnight in the hospital in the last 6 months?” | No report of being hospitalized |
| No bed days | BED | “During the past two weeks, how many days have you stayed
in bed all or most of the day because of illness or injury?” | No days in bed reported |
| Life satisfaction | SPL | “How satisfied are you with the meaning and purpose of your
life? on a scale of 1–10, with 1 being extremely and 10 being not at all” | Score of 1 to 4 |
| Life as a whole | FLW | “How do you feel about life as a whole?” (1: delighted; 3:
mostly satisfied; 6: terrible) | Score of 1–3 |
| Not depressed | DEP | 10 questions of the center for epidemiologic studies short
depression scale [25], each ranked 0–3 | Score < 10, out of a possible 30 points |
| No limitations in activities of daily living | ADL | “Do you have any difficulty performing this activity?” from a list of walking, transferring, eating, dressing, bathing, or toileting | No difficulties reported |
| No limitations in independent activities of daily living | IADL | “Do you have any difficulty performing this activity?”
from a list of heavy or light housework, shopping, meal
preparation, money management, or telephoning | No difficulties reported |
| Intact extremity strength | EXSTR | “Do you have any difficulty with this activity” from a list
of lifting, reaching, or gripping | No difficulty reported |
| Self-rated health | SRH | “How would you rate your health in general: excellent,
very good, good, fair, or poor?” | Excellent, very good, or good self-reported health |
| Intact cognition | COG | Modified minimental state examination [26], scored from 0 to 100 | Score above 89 |
| Ability to ambulate | TWLK | Timed 15 foot walk | Less than 10 seconds |
| Frequent ambulation | BLK | “During the last week, how many city blocks did you walk?” | >4 blocks per day, on average |
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