Table 1 Characteristics of enrolled pneumonia patients
Total | No comorbidity | Chronic respiratory disease | Other comorbiditiesa | P value† | |
|---|---|---|---|---|---|
N = 2617 | N = 574 | N = 790 | N = 1253 | ||
N (%) | N (%) | N (%) | N (%) | ||
Male sex | 1591 (60.8) | 295 (51.4) | 540 (68.4) | 756 (60.3) | <0.001 |
Age group | |||||
15–64 | 580 (22.2) | 268 (46.7) | 121 (15.3) | 191 (15.2) | <0.001 |
65–74 | 447 (17.1) | 91 (15.9) | 141 (17.9) | 215 (17.2) | |
75–84 | 848 (32.4) | 126 (22.0) | 321 (40.6) | 401 (32.0) | |
85+ | 742 (28.4) | 89 (15.5) | 207 (26.2) | 446 (35.6) | |
Admission | 2007 (76.7) | 305 (53.1) | 597 (75.6) | 1105 (88.2) | <0.001 |
Performance status ≥3, n = 1307 | 310 (23.7) | 37 (11.1) | 56 (13.9) | 217 (37.9) | <0.001 |
Severe disease (CURB65 ≥ 4), n = 2100 | 154 (7.3) | 19 (4.5) | 41 (6.7) | 94 (8.9) | 0.010 |
Duration of symptomsb > 3 days, n = 2507 | 874 (34.9) | 256 (47.8) | 251 (33.3) | 367 (30.2) | <0.001 |
No. of symptoms ≥3 | 1664 (63.6) | 390 (67.9) | 554 (70.1) | 720 (57.5) | <0.001 |
Aspiration risk, n = 2545 | 1189 (46.7) | 103 (18.4) | 293 (37.8) | 793 (65.5) | <0.001 |
Period | |||||
Spring (January to March) | 645 (24.7) | 129 (22.5) | 195 (24.7) | 321 (25.6) | 0.092 |
Summer (April to June) | 572 (21.9) | 147 (25.6) | 161 (20.4) | 264 (21.1) | |
Autumn (July to September) | 641 (24.5) | 151 (26.3) | 189 (23.9) | 301 (24.0) | |
Winter (October to December) | 759 (29.0) | 147 (25.6) | 245 (31.0) | 367 (29.3) | |
Study site | |||||
Ebetsu | 326 (12.4) | 79 (13.8) | 123 (15.6) | 124 (9.9) | <0.001 |
Kamogawa | 1379 (52.7) | 348 (60.6) | 416 (52.7) | 615 (49.1) | |
Kochi | 600 (22.9) | 96 (16.7) | 153 (19.4) | 351 (28.0) | |
Nagasaki | 312 (11.9) | 51 (8.9) | 98 (12.4) | 163 (13.0) | |