Table 4

Length of stay, risk of ICU admission and pulmonary complications according to LRTI manifestation group
No infiltrate and no bacteraemia patients Infiltrate without bacteraemia patients Bacteraemia patients
n (%) a Crude RR b Adjusted RR c n (%) a Crude RR b Adjusted RR c n (%) a Crude RR b Adjusted RR c
LOS (days) 5 (2–9) 1.0 (ref.) 1.0 (ref.) 6 (4–16) 1.6 (1.3-2.0) 1.5 (1.2-1.9) 8 (4–19) 2.0 (1.6-2.4) 2.1 (1.7-2.6)
ICU admission 14 (7) 1.0 (ref.) 1.0 (ref.) 51 (20) 2.8 (1.6-5.0) 2.4 (1.4-4.1) 60 (23) 3.2 (1.8-5.5) 3.1 (1.8-5.5)
Pulmonary complications d 2 (1) 1.0 (ref.) 1.0 (ref.) 12 (5) 4.6 (1.0-20.5) 4.6 (1.0-21.4) 36 (14) 13.3 (3.2-54.5) 12.6 (2.9-53.8)

LRTI, lower respiratory tract infection; RR, relative risk; LOS, length of stay; ICU, intensive care unit; ref, reference.

a Data are median (interquartile range) or n (% of all in the manifestation group).

b The crude measures are median ratios (95% CI) or prevalence proportion ratios (95% CI).

c The multiple adjusted relative risks are computed using linear regression for LOS, and Poisson regression for ICU admission and pulmonary complications. The estimates are adjusted for age, sex, smoking, alcohol, and comorbidity.

d Pulmonary complications include pleural effusion, pleural drainage, empyema, and lung abscess.

Data available for over 99%.

Skovgaard et al.

Skovgaard et al. BMC Infectious Diseases 2013 13:197   doi:10.1186/1471-2334-13-197

Open Data