| Variable | Subjects, n (%) | COCI Score, mean (SD) | COCI Groups by Score, n (%) | P Value | ||
|---|---|---|---|---|---|---|
| Low (<0.44) | Medium (0.44–1) | High (1) | ||||
| All subjects | 3015 (100) | 0.65 (0.32) | 1011 (33.5) | 956 (31.7) | 1048 (34.8) | |
| Sex | <.001* | |||||
| Female | 1062 (35.2) | 0.69 (0.32) | 316 (29.8) | 304 (28.8) | 442 (41.6) | |
| Male | 1683 (64.8) | 0.63 (0.32) | 695 (35.6) | 652 (33.4) | 606 (31.0) | |
| Age (years) | <.001* | |||||
| <65 | 964 (32.0) | 0.69 (0.32) | 280 (29.0) | 276 (28.6) | 408 (42.3) | |
| 65–69 | 421 (14.0) | 0.65 (0.32) | 135 (32.1) | 138 (32.8) | 148 (35.2) | |
| 70–74 | 485 (16.1) | 0.64 (0.32) | 164 (33.8) | 156 (32.2) | 165 (34.0) | |
| 75–79 | 546 (18.1) | 0.61 (0.31) | 200 (36.6) | 187 (34.2) | 159 (29.1) | |
| 80–84 | 363 (12.0) | 0.62 (0.31) | 139 (38.3) | 119 (32.8) | 105 (28.9) | |
| ≥85 | 236 (7.8) | 0.60 (0.30) | 93 (39.4) | 80 (33.9) | 63 (26.7) | |
| Low-income status | .047* | |||||
| No | 2919 (96.8) | 0.65 (0.32) | 973 (33.3) | 920 (31.5) | 1026 (35.1) | |
| Yes | 96 (3.2) | 0.58 (0.31) | 38 (39.6) | 36 (37.5) | 22 (22.9) | |
| CCI score | .095* | |||||
| 0 | 2331 (77.3) | 0.65 (0.32) | 793 (34.0) | 711 (30.5) | 827 (35.5) | |
| 1–2 | 494 (16.4) | 0.66 (0.31) | 155 (31.4) | 174 (35.2) | 165 (33.4) | |
| ≥3 | 190 (6.3) | 0.63 (0.30) | 63 (33.2) | 71 (37.4) | 56 (29.5) | |
| Avoidable hospitalization | .001* | |||||
| Yes | 95 (3.2) | 0.55 (0.29) | 45 (47.4) | 34 (35.8) | 16 (16.8) | |
| No | 2920 (96.8) | 0.65 (0.32) | 966 (33.1) | 922 (31.6) | 1032 (35.3) | |
| ED visits† | 0.22 (0.81)§ | 0.31 (0.94) | 0.27 (0.94) | 0.10 (0.46) | <.001‡ | |
↵* χ2 Test for the differences among the 3 Continuity of Care Index (COCI) groups.
↵† Chronic obstructive pulmonary disease–related emergency department (ED) visits in the continuity of care period.
↵‡ One-way analysis of variance test for the difference in mean by COCI groups.
CCI, Charlson Comorbidity Index; SD, standard deviation.