Characteristics | No infiltrate and no bacteraemia patients | Infiltrate without bacteraemia patients | Bacteraemia patients | ||||
---|---|---|---|---|---|---|---|
 | n (%) a | PR (95% CI) | n (%) a | PR (95% CI) | n (%) a | PR (95% CI) | |
Medical ward | 188 (97) | 1.0 (ref.) | 229 (92) | 0.9 (0.9-1.0) | 249 (95) | 1.0 (0.9-1.0) | |
Community acquired b | 167 (87) | 1.0 (ref.) | 217 (87) | 1.0 (0.9-1.1) | 242 (92) | 1.1 (1.0-1.1) | |
Antibiotics | 155 (80) | 1.0 (ref.) | 235 (94) | 1.2 (1.1-1.3) | 260 (99) | 1.2 (1.2-1.3) | |
Aetiology | |||||||
 | Pneumococcal only | 137 (71) | 1.0 (ref.) | 178 (71) | 1.0 (0.9-1.1) | 219 (84) | 1.2 (1.1-1.3) |
 | Pneumococcal mixed c | 56 (29) | 1.0 (ref.) | 72 (29) | 1.0 (0.7-1.3) | 43 (16) | 0.6 (0.4-0.8) |
Respiratory symptoms d | |||||||
 | 0 | 0 (0) | 1.0 (ref.) | 20 (8) | NA | 35 (13) | NA |
 | 1 | 33 (17) | 1.0 (ref.) | 25 (10) | 0.6 (0.4-0.9) | 56 (21) | 1.3 (0.8-1.8) |
 | 2 | 44 (23) | 1.0 (ref.) | 59 (24) | 1.0 (0.7-1.5) | 79 (30) | 1.3 (1.0-1.8) |
 | âĽ3 | 116 (60) | 1.0 (ref.) | 146 (58) | 1.0 (0.8-1.1) | 92 (36) | 0.6 (0.5-0.7) |
Oxygen saturation (peripheral) | 94 (91â96) | Â | 92 (88â95) | Â | 93 (89â95) | Â | |
Temperature âĽ38.5°C | 35 (20) | 1.0 (ref.) | 86 (37) | 1.8 (1.3-2.6) | 126 (50) | 2.5 (1.8-3.4) | |
MAP (mmHg) | 91 (78â103) | Â | 88 (73â99) | Â | 80 (72â97) | Â | |
CURB65 âĽ2 | 68 (35) | 1.0 (ref.) | 121 (48) | 1.4 (1.1-1.7) | 160 (61) | 1.7 (1.4-2.1) | |
PITT âĽ4 | 12 (6) | 1.0 (ref.) | 28 (11) | 1.8 (0.9-3.4) | 41 (16) | 2.5 (1.4-4.7) | |
CRP (mg/L) | |||||||
 | Median | 82 (36â140) |  | 163 (70â246) |  | 316 (219â404) |  |
 | <50 | 54 (31) | 1.0 (ref.) | 41 (17) | 0.6 (0.4-0.8) | 8 (3) | 0.1 (0.1-0.2) |
 | 50-99 | 46 (26) | 1.0 (ref.) | 36 (15) | 0.6 (0.4-0.9) | 14 (6) | 0.2 (0.1-0.4) |
 | 100-199 | 52 (30) | 1.0 (ref.) | 68 (29) | 1.0 (0.7-1.3) | 32 (13) | 0.4 (0.3-0.6) |
 | âĽ200 | 24 (14) | 1.0 (ref.) | 91 (39) | 2.8 (1.9-4.2) | 196 (78) | 5.7 (3.9-8.4) |
Leukocyte count (109/L) | |||||||
 | Median | 14 (11â17) |  | 14 (11â19) |  | 17 (12â23) |  |
 | <3,5 | 3 (1) | 1.0 (ref.) | 8 (3) | 6.1 (0.8-48.0) | 17 (7) | 12.2 (1.6-90.5) |
 | 3.5-8.7 | 17 (10) | 1.0 (ref.) | 25 (11) | 1.1 (0.6-2.0) | 22 (9) | 0.9 (0.5-1.7) |
 | 8.8-14.9 | 90 (51) | 1.0 (ref.) | 98 (42) | 0.8 (0.7-1.0) | 57 (23) | 0.5 (0.3-0.6) |
 | âĽ15.0 | 70 (40) | 1.0 (ref.) | 103 (44) | 1.1 (0.9-1.4) | 153 (61) | 1.6 (1.3-1.9) |