Table 3 Coding of variables for the Yale Precipitating Events Project
From: Comparison of alternate scoring of variables on the performance of the frailty index
Variable name | Ordinal response/code | Dichotomous response/code |
|---|---|---|
Help eating | no = 0, yes = 1 | no = 0, yes = 1 |
Help grooming | no = 0, yes = 1 | no = 0, yes = 1 |
Help using toilet | no = 0, yes = 1 | no = 0, yes = 1 |
Help up/down stairs | no = 0, yes = 1 | no = 0, yes = 1 |
Help lifting 10 lbs. | no = 0, yes = 1 | no = 0, yes = 1 |
Help shopping | no = 0, yes = 1 | no = 0, yes = 1 |
Help with housework | no = 0, yes = 1 | no = 0, yes = 1 |
Help with meal preparations | no = 0, yes = 1 | no = 0, yes = 1 |
Help taking medication | no = 0, yes = 1 | no = 0, yes = 1 |
Help with finances | no = 0, yes = 1 | no = 0, yes = 1 |
Lost more than 10 pounds in the last year | no = 0, yes = 1 | no = 0, yes = 1 |
High blood pressure | no = 0, yes = 1 | no = 0, yes = 1 |
How health has changed in last year | better = 0, same = 0.5, worse = 1 | better/same = 0, worse = 1 |
Heart attack | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
CHF | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
Stroke | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
Cancer | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
Diabetes | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
Arthritis | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
Chronic lung disease | no = 0, suspected = 0.5, yes = 1 | no = 0, yes/suspected = 1 |
Feel everything is an effort | rarely = 0, sometimes = 0.5, most of the time = 1 | rarely = 0, most/some of the time = 1 |
Feel depressed | rarely = 0, sometimes = 0.5, most of the time = 1 | rarely = 0, most/some of the time = 1 |
Feel happy | most of the time = 0, sometimes = 0.5, rarely = 1 | most/some of the time = 0, rarely = 1 |
Feel lonely | rarely = 0, sometimes = 0.5, most of the time = 1 | rarely = 0, most/some of the time = 1 |
Have trouble getting going | rarely = 0, sometimes = 0.5, most of the time = 1 | rarely = 0, most/some of the time = 1 |
BMI | 18.5-24.99 = 0, <18.5 & 25-30 = 0.5, >30 = 1 | 18.5-24.99 = 0, <18.5 & > 25 = 1 |
Walk outside | often = 0, sometimes = 0.333, seldom = 0.666, never = 1 | often = 0, sometimes/seldom/never = 1 |
Self-rating of health | excellent = 0, very good = 0.25, good = 0.5, fair = 0.75, poor = 1 | good/very good/excellent = 0, fair/poor = 1 |
MMSE | >25 = 0, 21-24 = 0.25, 18-20 = 0.5, 10-17 = 0.75, <10 = 1 | >24 = 0, <24 = 1 |
Usual pace | <9.3 = 0, 9.3-10.7 = 0.25, 10.8-12.6 = 0.5, 12.7-15.5 = 0.75, >15.5 = 1 | ≤16 = 0, >16 = 1 |
Rapid pace | <7.0 = 0, 7.0-8.4 = 0.25, 8.5-10.4 = 0.5, 10.5-12.9 = 0.75, >12.9 = 1 | ≤10 = 0, >10 = 1 |
Peak flow | Men | Men |
>526 = 0, 461-525 = 0.25, 408-460 = 0.5, 311-407 = 0.75, <310 = 1 | >340 = 0, ≤340 = 1 | |
Women | Women | |
>366 = 0, 324-366 = 0.25, 264-323 = 0.5, 210-263 = 0.75, <210 = 1 | >310 = 0, ≤310 = 1 | |
Shoulder strength | Men | Men |
>16.37 = 0, 14.57-16.36 = 0.25, 13.26-14.56 = 0.5, 10.83-13.25 = 0.75, <10.82 = 1 | >12 = 0, ≤12 = 1 | |
Women | Women | |
>13.00 = 1, 11.10-12.90 = 0.25, 9.40-11.00 = 0.5, 7.30-9.30 = 0.75, <7.29 = 1 | >9 = 0, ≤9 = 1 |