Table 1

Baseline demographics for 17 124 patients from the Northwest Kaiser Permanente Health System

Variables in 2013Overall
n=17 124
Live 1
n=264
Live 2
n=667
Live 3
n=3472
Live 4
n=6443
Live 5
n=6278
P value
N (%)17 124 (100)264 (0.02)667 (0.04)3472 (20)6443 (38)6278 (37)<0.001
Age (mean, SD)61.5±17.466.9±15.364.8±14.871.4±13.562.3±17.154.6±16.9<0.001
Sex (F, %)10 175 (59.4)120 (45.5)452 (67.8)1657 (47.7)4282 (66.5)3664 (58.4)<0.001
4-year mortality3206 (18.7)167 (63.3)316 (47.4)1353 (39.0)1098 (17.0)272 (4.3)<0.001
4-year palliative2685 (15.7)148 (56.1)279 (41.8)1128 (32.5)940 (14.6)190 (3.0)<0.001
4-year hospice1757 (10.3)70 (26.5)151 (22.6)738 (21.3)653 (10.1)145 (2.3)<0.001
Smoking
 Current2845 (16.6)41 (15.5)118 (17.7)364 (10.5)1038 (16.1)1284 (20.5)<0.001
 Former7481 (43.7)124 (47.0)318 (47.7)1928 (55.5)2904 (45.1)2207 (35.2)<0.001
 Never6483 (37.9)85 (32.2)216 (32.4)1125 (32.4)2386 (37.0)2671 (42.5)<0.001
 Not available315 (1.8)14 (5.3)15 (2.2)55 (1.6)115 (1.8)116 (1.8)<0.001
Race
 Caucasian14 874 (86.9)225 (85.2)598 (89.7)3062 (88.2)5572 (86.5)5417 (86.3)<0.001
 Other2250 (31.1)39 (14.8)69 (10.3)410 (11.8)871 (13.5)861 (13.7)<0.001
Spirometry1985 (11.6)31 (11.7)101 (15.1)443 (12.8)759 (11.8)651 (10.4)<0.001
  • Fisher’s exact test was used to determine statistical significance for categorical variables. A table summarising the demographics of patients included in this analysis from the Northwest Kaiser Permanente Health System is shown. Overall 4-year mortality was 18.7% ranging from 4.3% for lowest-risk LIVE 5 patients to 63.3% for highest-risk LIVE 1 patients. The lowest risk patients (LIVE 5) comprised 37% of the cohort, while the highest risk patients (LIVE 1) were very few and comprised only 0.2% of the cohort. Current smokers comprised 16.6% of the cohort with 43.7% former smokers and 37.9% never smokers. Spirometry was available in 11.6% of patients.

  • LIVE, Laboratory-based Intermountain Validated Exacerbation.