Table 3.
Results of random survival forest analysis using all (110) variables.
| Variable | Importance | Relative Importance |
|---|---|---|
| Blood urea nitrogen | 0.0054 | 1.0000 |
| KCCQ: Past two weeks swelling bother you | 0.0026 | 0.4758 |
| Glomerular filtration rate | 0.0014 | 0.2539 |
| SF-12 | 0.0013 | 0.2479 |
| KCCQ: Bathing yourself | 0.0013 | 0.2426 |
| KCCQ: Past 2 weeks has shortness of breath bothered you | 0.0011 | 0.2047 |
|
| ||
| KCCQ: Limited intimate relationships | 0.0011 | 0.2031 |
| Systolic blood pressure | 0.0010 | 0.1819 |
| PSS: Confident to handle problems | 0.0009 | 0.1666 |
| KCCQ: Past 2 weeks did you have swelling | 0.0009 | 0.1657 |
| KCCQ: Physical | 0.0008 | 0.1524 |
| KCCQ: In last 2 weeks have symptoms changed | 0.0007 | 0.1312 |
| Economic burden | 0.0007 | 0.1292 |
| KCCQ: Symptoms limited your work | 0.0007 | 0.1245 |
| KCCQ: Last 2 weeks felt discouraged | 0.0007 | 0.1230 |
| Medical history - chronic pulmonary disease | 0.0006 | 0.1167 |
| KCCQ: Limited visiting family | 0.0006 | 0.1143 |
| KCCQ: Dressing yourself | 0.0006 | 0.1104 |
| PHQ9: Speaking very slowly | 0.0006 | 0.1034 |
| KCCQ: Past two weeks has fatigue bothered you | 0.0005 | 0.0901 |
| Morisky: Forgotten your medications | 0.0005 | 0.0877 |
| KCCQ: Doing yard work | 0.0005 | 0.0872 |
| Ware: Doctors ignore what I tell them | 0.0004 | 0.0800 |
| Medical history - coronary artery disease | 0.0004 | 0.0693 |
| ESSI: Someone you are close to | 0.0004 | 0.0668 |
| Medical history - permanent pacemaker | 0.0003 | 0.0640 |
| ESSI: Give you love and affection | 0.0003 | 0.0627 |
| PHQ9: Feeling bad about yourself | 0.0003 | 0.0608 |
| Medical history - illicit drug use | 0.0003 | 0.0566 |
| KCCQ: Limited your hobbies | 0.0003 | 0.0560 |
| PHQ9: Feeling down | 0.0003 | 0.0502 |
| KCCQ: Climbing a flight of stairs | 0.0003 | 0.0477 |
| Pitting edema | 0.0003 | 0.0467 |
| Live alone | 0.0002 | 0.0460 |
| KCCQ: Hurrying or jogging | 0.0002 | 0.0456 |
| KCCQ: Past two weeks has fatigue limited you | 0.0002 | 0.0450 |
| Jugular venous distention | 0.0002 | 0.0412 |
| PHQ9: Trouble concentrating | 0.0002 | 0.0390 |
| Education | 0.0002 | 0.0354 |
| Ware: Get medical care whenever I need | 0.0002 | 0.0332 |
| REALM: REALM-R card to the patient - constipation | 0.0002 | 0.0314 |
| Financially how are you | 0.0002 | 0.0289 |
| REALM: REALM-R card to the patient - osteoporosis | 0.0001 | 0.0278 |
| Ware: Doctor treats me friendly | 0.0001 | 0.0270 |
| REALM: REALM-R card to the patient - fatigue | 0.0001 | 0.0252 |
| Ware: Medical care is perfect | 0.0001 | 0.0251 |
| ESSI: Give you emotional support | 0.0001 | 0.0245 |
| Ware: Doctor spends plenty of time with me | 0.0001 | 0.0190 |
| Hispanic | 0.0001 | 0.0176 |
| Ware: Access to specialists | 0.0001 | 0.0166 |
| Medical history - ischemic cardiomyopathy | 0.0001 | 0.0165 |
| KCCQ: Past two weeks has shortness of breath limited you | 0.0001 | 0.0153 |
| PHQ9: Trouble sleeping | 0.0001 | 0.0151 |
| Ware: Have to wait too long for emergency | 0.0001 | 0.0144 |
| Waist (inches) | 0.0001 | 0.0141 |
| Waist/Hip ratio | 0.0001 | 0.0120 |
| Ware: Careful to check everything | 0.0001 | 0.0096 |
| Smoking status | 0.0000 | 0.0075 |
| Medical history - prior myocardial infarction | 0.0000 | 0.0042 |
| ESSI: Give you good advice | 0.0000 | 0.0036 |
| KCCQ: Understand how to keep from getting worse | 0.0000 | 0.0016 |
| Currently have a doctor for your health care | 0.0000 | 0.0016 |
| Morisky: If feeling worse then stop medication | 0.0000 | 0.0003 |
| PSS: Unable to control important things in life | 0.0000 | 0.0002 |
| Race | 0.0000 | −0.0027 |
| KCCQ: Past two weeks had to sleep sitting up | 0.0000 | −0.0039 |
| Difficult to get care | 0.0000 | −0.0040 |
| PHQ9: Better off dead | 0.0000 | −0.0048 |
| Medical history - cerebrovascular disease/prior stroke | 0.0000 | −0.0062 |
| KCCQ: Walking one block | 0.0000 | −0.0067 |
| ESSI: Help with daily chores | 0.0000 | −0.0077 |
| New York Heart Association | 0.0000 | −0.0078 |
| Morisky: Stop taking your medication | 0.0000 | −0.0080 |
| PHQ9: Feeling tired | 0.0000 | −0.0086 |
| Ware: Doctor explains well | 0.0000 | −0.0092 |
| REALM: REALM-R card to the patient - colitis | −0.0001 | −0.0096 |
| REALM: REALM-R card to the patient - anemia | −0.0001 | −0.0100 |
| Ware: Dissatisfied with medical care | −0.0001 | −0.0113 |
| PSS: Difficulties are piling up | −0.0001 | −0.0134 |
| Avoided health care due to cost | −0.0001 | −0.0139 |
| REALM | −0.0001 | −0.0152 |
| REALM: REALM-R card to the patient - allergic | −0.0001 | −0.0153 |
| PHQ9: Poor appetite | −0.0001 | −0.0165 |
| Pulmonary | −0.0001 | −0.0171 |
| Ware: Doubts about doctor treating me | −0.0001 | −0.0191 |
| Low cognition | −0.0001 | −0.0196 |
| PSS: Things are going your way | −0.0001 | −0.0204 |
| Symptoms - tiredness/fatigue | −0.0001 | −0.0208 |
| PHQ9: Little interest in doing things | −0.0001 | −0.0223 |
| KCCQ: Rest of life with heart failure | −0.0001 | −0.0225 |
| Body mass index | −0.0001 | −0.0226 |
| Ware: Doctor acts too businesslike | −0.0001 | −0.0238 |
| Ware: Hurry too much when treating me | −0.0001 | −0.0245 |
| Female | −0.0001 | −0.0250 |
| REALM: REALM-R card to the patient - jaundice | −0.0001 | −0.0267 |
| Ware: Doctor’s office has everything needed | −0.0001 | −0.0271 |
| KCCQ: Whom to call if getting worse | −0.0002 | −0.0290 |
| Medical history - hypertension | −0.0002 | −0.0296 |
| KCCQ: Limited enjoyment of life | −0.0002 | −0.0313 |
| Morisky: Careless about taking medication | −0.0002 | −0.0314 |
| REALM: REALM-R card to the patient - directed | −0.0002 | −0.0419 |
| Work status | −0.0002 | −0.0424 |
| Medical history - diabetes | −0.0003 | −0.0485 |
| Ware: Hard to get an appointment | −0.0003 | −0.0496 |
| Left ventricular ejection fraction | −0.0003 | −0.0514 |
| Ware: Receive care without financial worry | −0.0003 | −0.0554 |
| Have health insurance | −0.0003 | −0.0561 |
| ESSI: Someone available when need to talk | −0.0004 | −0.0791 |
| Ware: Pay more than I can afford | −0.0006 | −0.1032 |
| Age | −0.0009 | −0.1620 |
ESSI, ENRICHD Social Support Instrument; KCCQ, Kansas City Cardiomyopathy Questionnaire; PHQ, Patient Health Questionnaire; PSS, Perceived Stress Scale; REALM, Rapid Estimate of Adult Literacy in Medicine; SF12, 12-Item Short Form Health Survey