Table 2.
Multi-morbidity items by exploratory factor analysis derived frailty domain
| Domain | Indictor |
|---|---|
| Mobility | Finger dexteritya |
| Timed turna | |
| Grip strengthb | |
| Use of walker, cane, or wheelchairc | |
| Instrumental health | Health has affected ability to traveld |
| Health has affected ability to socialized | |
| Health has affected ability to do hobbiesd | |
| Health has affected ability to do mental activitiesd | |
| Health has affected ability to get around townd | |
| Health has affected ability to do choresd | |
| Emotional wellbeing | Bradburn negative affect (restless, lonely, bored, depressed, upset due to criticism)e |
| CES-D “during the past week, my sleep was restless”f | |
| CES-D “during the past week, I felt depressed”f | |
| CES-D “during the past week, I felt lonely”f | |
| Comorbidity | Anemiag |
| Sex-related health problems (i.e., gynecological problems or prostate problems)g | |
| Gastrointestinal problems (colitis/diverticulitis, gall bladder trouble, and/or liver trouble)g | |
| Kidney or bladder troubleg | |
| Respiratory symptoms | Feeling short of breathc |
| Bronchitis or emphysemag | |
| Asthmag | |
| Cardiac symptoms | Pulse pressureh |
| Heart troubleg | |
| Hardening of arteries (i.e., atherosclerosis)g | |
| High blood pressureg | |
| Strokeg | |
| Physical activity | Stay at home but in chair most of the timec |
| Health has affected ability to do physical recreational activitiesd | |
| Spinal condition and/or back troubleg | |
| Arthritis (rheumatoid and/or osteo)g |
aPerformance was recoded as 0 (< 90th percentile) or 1 (within 90th percentile)
bPerformance was recoded as 0 or 1. See Supplementary Table 1, Additional File 1
c0 = no, 1 = yes
d0 = no change, improved, N/A; 0.25 = slightly reduced; 0.50 = moderately reduced; 0.75 = drastically reduced; 1 = gave up doing activity
e0 = no to all; 0.2 = yes to one; 0.4 = yes to two; 0.6 = yes to three; 0.8 = yes to four; 1 = yes to all
f0 = rarely or none of the time; 0.33 = some or a little of the time; 0.67 = occasionally or a moderate amount of the time; 1 = most or all of the time
g0 = no; 0.33 = yes, not serious; 0.67 = yes, moderately serious; 1 = yes, very serious
hPerformance was recoded as 0 = 32.13–63.90; 0.5 = 64–75.9; 1 = 76+