Online Table I - Initial antibacterial therapy according to compliance with therapeutic recommendations and phase of the study. Retrospective phase N Compliant with guidelines Levofloxacin (~) monotherapy Ceftriaxone or cefotaxime or cefepime + advanced macrolide Amoxycillin/clavulanate (~) + advanced macrolide Levofloxacin (~) + antipneumococcal beta-lactam (§) Antianaerobe + levofloxacin (~) or amoxycillin/clavulanate (~) Non-compliant with guidelines Ceftriaxone or cefotaxime or cefepime monotherapy Amoxycillin/clavulanate (~) monotherapy Other monotherapies (†) Antianaerobe monotherapy Two-drug combinations with levofloxacin Two-drug combinations with antipneumococcal beta-lactams (§)(†) Other two-drug combinations (†) Three-drug combinations (†) Other combinations containing antianaerobes (%) Prospective phase N (%) 476 (33.0) 616 (43.9) 150 (10.4) 164 (11.4) 78 (5.4) 80 (5.5) 4 (0.3) 214 (15.2) 167 (11.9) 152 (10.8) 76 (5.4) 7 (0.5) 967 (67.0) 788 (56.1) 254 (17.6) 209 (14.5) 245 (17.0) 2 (0.1) 52 (3.6) 83 (5.8) 96 (6.7) 14 (1.0) 12 (0.8) 198 (14.1) 169 (12.0) 184 (13.1) 0 55 (3.9) 54 (3.8) 105 (7.5) 6 (0.4) 17 (1.2) ~) or equivalent antibiotic of the same class. §) ceftriaxone, cefotaxime, cefepime, amoxycillin/clavulanate or equivalent penicillin. †) excluding antianaerobes or antianaerobe-containing combinations. Online Table II - Initial antibacterial therapy according to phase of the study: detail of therapies compliant with therapeutic recommendations. Proportions < 1% are omitted. Retrospective phase N (%) Prospective phase N (%) Levofloxacin (~) monotherapy levofloxacin moxifloxacin 150 (10.4) 150 (10.4) 0 214 (15.2) 213 (15.2) 1 Ceftriaxone or cefotaxime or cefepime + advanced macrolide ceftriaxone + clarithromycin ceftriaxone + azithromycin cefotaxime + clarithromycin cefotaxime + azithromycin cefepime + clarithromycin 164 (11.4) 138 (9.6) 1 23 (1.6) 0 2 167 (11.9) 104 (7.4) 32 (2.3) 20 (1.4) 8 3 Amoxycillin/clavulanate (~) + advanced macrolide amoxycillin/clavulanate + clarithromycin amoxycillin/clavulanate + azithromycin ampicillin/sulbactam + clarithromycin ampicillin/sulbactam + azithromycin ampicillin + clarithromycin 78 67 0 9 0 2 (5.4) (4.6) Levofloxacin (~) + antipneumococcal beta-lactam (§) levofloxacin + amoxycillin/clavulanate levofloxacin + ampicillin/sulbactam levofloxacin + ceftriaxone levofloxacin + cefotaxime levofloxacin + cefepime moxifloxacin + amoxycillin/clavulanate 80 40 4 19 17 0 0 (5.5) (2.8) Antianaerobe + levofloxacin or amoxycillin/clavulanate (~) levofloxacin + metronidazole levofloxacin + clindamycin amoxycillin/clavulanate + metronidazole ampicillin/sulbactam + clindamycin (1.3) (1.2) 4 1 0 3 0 ~) or equivalent antibiotic of the same class. §) ceftriaxone, cefotaxime, cefepime, amoxycillin/clavulanate or equivalent penicillin. 152 (10.8) 90 (6.4) 47 (3.3) 4 11 0 76 18 4 38 13 2 1 7 3 1 2 1 (5.4) (1.3) (2.7) Online Table III - Initial antibacterial therapy according to phase of the study: detail of monotherapies non-compliant with therapeutic recommendations. Proportions < 1% are omitted. Retrospective phase N (%) Prospective phase N (%) Ceftriaxone or cefotaxime or cefepime monotherapy ceftriaxone cefotaxime cefepime 254 (17.6) 178 (12.3) 67 (4.6) 9 198 (14.1) 166 (11.8) 29 (2.1) 3 Amoxycillin/clavulanate (~) monotherapy amoxycillin/clavulanate ampicillin/sulbactam amoxycillin ampicillin 209 (14.5) 148 (10.3) 56 (3.9) 2 3 169 (12.0) 134 (9.5) 32 (2.3) 1 2 Other monotherapies (†) ceftazidime cefodizime ceftizoxime cephazolin cefoxitin or cefonicid cefixime imipenem/cilastatin piperacillin piperacillin/tazobactam ticarcillin/clavulanate penicillin ciprofloxacin pefloxacin or lomefloxacin clarithromycin azithromycin tobramycin netilmicin teicoplanin trimethoprim/sulphamethoxazole doxycycline 245 (17.0) 48 (3.3) 25 (1.7) 21 (1.5) 2 2 0 10 35 (2.4) 20 (1.4) 2 2 38 (2.6) 1 29 (2.0) 0 2 2 4 2 0 184 (13.1) 27 (1.9) 7 11 3 2 1 8 22 (1.6) 51 (3.6) 0 0 35 (2.5) 2 8 4 1 0 0 1 1 Antianaerobe monotherapy clindamycin metronidazole ~) or equivalent antibiotic of the same class. †) excluding antianaerobes. 2 1 1 0 0 0 Online Table IVa - Initial antibacterial therapy according to phase of the study: detail of combination therapies non-compliant with therapeutic recommendations [1- continues]. Proportions < 1% are omitted. Retrospective phase Prospective phase N (%) N (%) Two-drug combinations with levofloxacin levofloxacin + cefodizime levofloxacin + ceftazidime levofloxacin + ceftizoxime or ceftibuten or cefonicid levofloxacin + piperacillin/tazobactam levofloxacin + piperacillin levofloxacin + imipenem/cilastatin or meropenem levofloxacin + clarithromycin or azithromycin levofloxacin + aminoglycoside levofloxacin + teicoplanin levofloxacin + other 52 14 8 4 10 2 3 8 3 0 0 (3.6) (1.0) 55 15 8 2 8 4 2 10 0 3 3 (3.9) (1.1) Two-drug combinations with antipneumococcal beta-lactams (§)(†) ceftriaxone + ciprofloxacin ceftriaxone + amikacin ceftriaxone + netilmicin ceftriaxone + gentamicin cefotaxime + ciprofloxacin cefotaxime + aminoglycosides amoxycillin/clavulanate + ciprofloxacin amoxycillin/clavulanate + amikacin amoxycillin/clavulanate + netilmicin amoxycillin/clavulanate + gentamicin ampicillin/sulbactam + ciprofloxacin ceftriaxone or cefepime + teicoplanin ampicillin/sulbactam + aminoglycosides ceftriaxone + amoxycillin/clavulanate or ampicillin/sulbactam miscellaneous 83 2 15 6 4 2 5 14 4 6 2 3 3 6 3 8 (5.8) 54 10 7 0 0 3 4 11 4 1 2 1 0 3 3 5 (3.8) (1.0) (1.0) §) ceftriaxone, cefotaxime, cefepime, amoxycillin/clavulanate or equivalent penicillin. †) excluding antianaerobe-containing combinations. Online Table IVb - Initial antibacterial therapy according to phase of the study: detail of combination therapies non-compliant with therapeutic recommendations [2- continuation]. Proportions < 1% are omitted. Retrospective phase Prospective phase N (%) N (%) Other two-drug combinations (†) ceftazidime + clarithromycin or azithromycin ceftizoxime or cefodizime + clarithromycin or azithromycin or roxithromycin cephazolin + clarithromycin or azithromycin cefoxitin + clarithromycin or azithromycin imipenem/cilastatin or meropenem + clarithromycin or azithromycin piperacillin/tazobactam + clarithromycin or azithromycin piperacillin + clarithromycin ticarcillin/clavulanate + clarithromycin ceftazidime + ciprofloxacin ceftizoxime or cefodizime or cefonicid + ciprofloxacin imipenem/cilastatin + ciprofloxacin piperacillin/tazobactam or ticarcillin/clavulanate + ciprofloxacin piperacillin + ciprofloxacin ceftazidime + aminoglycosides ceftizoxime or cefodizime or cefoxitin + aminoglycosides imipenem/cilastatin or meropenem + aminoglycosides piperacillin/tazobactam + aminoglycosides piperacillin + aminoglycosides ciprofloxacin + clarithromycin clarithromycin + aminoglycosides ceftazidime + teicoplanin or vancomycin imipenem/cilastatin + teicoplanin piperacillin/tazobactam + teicoplanin amikacin + teicoplanin or vancomycin clarithromycin or azithromycin + teicoplanin or vancomycin miscellaneous 96 13 3 4 1 6 11 3 3 2 3 2 4 2 7 2 4 5 4 3 3 4 2 0 0 1 4 (6.7) 105 19 4 2 2 1 20 1 0 4 2 1 3 1 6 5 1 6 1 4 5 2 1 1 7 2 4 (7.5) (1.4) Three-drug combinations (†) ceftriaxone or cefotaxime + clarithromycin + aminoglycoside miscellaneous 14 4 10 (1.0) 6 0 6 (0.4) Other combinations containing antianaerobes aztreonam + clindamycin antipneumococcal beta-lactam + clindamycin antipneumococcal beta-lactam + metronidazole other + clindamycin (two-drug combinations) other + metronidazole (two-drug combinations) other + aztreonam + clindamycin (three-drug combinations) others + metronidazole (three-drug combinations) 12 4 1 2 1 1 2 1 17 6 3 2 2 1 0 3 (1.2) (1.4) †) excluding antianaerobe-containing combinations. Online Table V - Outcome of first therapy cycle according to study phase, Fine score, and antibacterial treatment in the previous 2 weeks. Factor Level Success rate N (%) Study phase Retrospective Prospective Fine score (°) 90-100 to >200 Previous antibacterial treatment No Yes 1031 /1441 (71.5) 1034 /1400 (73.9) 1714 /2307 (74.3) 345 / 526 (65.6) Unadjusted RR (*) OR (*) 0.92 1.34 Adjusted (a) OR (*) (95%CI) P (^) 0.89 0.83 (0.69 - 1.00) 0.049 1.30 1.30 (1.25 - 1.34) <0.0001 1.52 1.46 (1.16 - 1.84) 0.002 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for failure versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table VI - Outcome of first therapy cycle according to study phase, Fine score, and antibacterial treatment in the previous 2 weeks. Sensitivity analysis excluding patients from nursing residence. Factor Level Success rate N (%) Study phase Fine score (°) Previous antibacterial treatment Retrospective Prospective 912 /1245 (73.3) 913 /1215 (75.1) Unadjusted RR (*) OR (*) 0.93 0.91 0.86 (0.70 - 1.05) 1.31 1.30 (1.25 - 1.36) <0.0001 1.50 1.47 (1.15 - 1.90) 91-100 (class IV) No Yes 1519 /2008 (75.6) 301 / 446 (67.5) Adjusted (a) 1.34 OR (*) (95%CI) P (^) 0.14 0.004 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for failure versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table VII - Success rates at the end of first therapy cycle by study phase and compliance with therapeutic recommendations. Non-compliant Compliant N (%) N (%) Retrospective phase 677 / 966 (70.1) 354 / 475 (74.5) Prospective phase 554 / 786 (70.5) 480 / 614 (78.2) P-value for interaction (logistic regression) 0.31 (unadjusted) 0.33 (adjusted) (*) *) for Fine score (as numerical variable on a 10-unit scale) and previous antibacterial treatment (yes/no). Online Table VIII - Outcome of first therapy cycle according to study phase, Fine score, antibacterial treatment in the previous 2 weeks, and compliance with therapeutic recommendations. Factor Level Success rate N (%) Unadjusted RR (*) OR (*) Adjusted (a) OR (*) (95%CI) P (^) Compliance with therapeutic guidelines No Yes 1231 /1752 (70.3) 834 /1089 (76.6) 0.79 0.72 0.74 (0.60 - 0.90) 0.004 Study phase Retrospective Prospective 1031 /1441 (71.5) 1034 /1400 (73.9) 0.92 0.89 0.86 (0.71 - 1.03) 0.10 1.30 1.29 (1.25 - 1.34) <0.0001 1.52 1.47 (1.16 - 1.85) Fine score (°) 90-100 to >200 Previous antibacterial treatment No 1714 /2307 (74.3) Yes 345 / 526 (65.6) 1.34 0.002 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for failure versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table IX - Outcome of first therapy cycle according to study phase, Fine score, antibacterial treatment in the previous 2 weeks, and compliance with therapeutic recommendations. Sensitivity analysis excluding patients from nursing residence. Factor Level Success rate N (%) Compliance with therapeutic guidelines No Yes Study phase Retrospective Prospective Fine score (°) 91-100 to >200 Previous antibacterial treatment No Yes Unadjusted RR (*) OR (*) 1073 /1497 (71.7) 752 / 963 (78.1) 0.77 912 /1245 (73.3) 913 /1215 (75.1) 0.93 1519 /2008 (75.6) 301 / 446 (67.5) 1.34 Adjusted (a) OR (*) (95%CI) P (^) 0.71 0.72 (0.58 - 0.89) 0.004 0.91 0.89 (0.72 - 1.09) 0.24 1.31 1.30 (1.25 - 1.36) <0.0001 1.50 1.48 (1.15 - 1.90) 0.004 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for failure versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table X - Mortality during first therapy cycle according to study phase, Fine score, and antibacterial treatment in the previous 2 weeks. Factor Level Death rate N (%) Study phase Retrospective Prospective Fine score (°) 91-100 to >200 Previous antibacterial treatment No Yes 179 /1443 (12.4) 162 /1404 (11.5) 268 /2312 (11.6) 72 / 527 (13.7) Unadjusted Adjusted (a) RR (*) OR (*) 0.93 0.92 0.81 (0.63 - 1.06) 1.37 1.43 (1.36 - 1.50) <0.0001 1.21 1.26 (0.91 - 1.75) 1.18 OR (*) (95%CI) P (^) 0.12 0.15 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for death versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table XI - Mortality during first therapy cycle according to study phase, Fine score, and antibacterial treatment in the previous 2 weeks. Sensitivity analysis excluding patients from nursing residence. Factor Level Death rate N (%) Study phase Retrospective Prospective Fine score (°) 91-100 to >200 Previous antibacterial treatment No Yes 132 /1247 (10.6) 119 /1219 (9.8) 197 /2013 (9.8) 54 / 447 (12.1) Unadjusted Adjusted (a) RR (*) OR (*) 0.92 0.91 0.80 (0.59 - 1.09) 1.37 1.44 (1.36 - 1.53) <0.0001 1.27 1.42 (0.98 - 2.07) 1.23 OR (*) (95%CI) P (^) 0.15 0.065 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for death versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table XII - Mortality during first therapy cycle by study phase and compliance with therapeutic recommendations. Non-compliant Compliant N (%) N (%) Retrospective phase 126 / 967 (13.0) 53 / 476 (11.1) Prospective phase 108 / 788 (13.7) 54 / 616 P-value for interaction (logistic regression) (8.8) 0.19 (unadjusted) 0.22 (adjusted) (*) *) for Fine score (as numerical variable on a 10-unit scale) and previous antibacterial treatment (yes/no). Online Table XIII - Mortality during first therapy cycle according to study phase, Fine score, antibacterial treatment in the previous 2 weeks, and compliance with therapeutic recommendations. Factor Level Death rate N (%) Unadjusted RR (*) OR (*) Adjusted (a) OR (*) (95%CI) P (^) Compliance with therapeutic guidelines No Yes 234 /1755 (13.3) 107 /1092 (9.8) 0.73 0.71 0.77 (0.58 - 1.04) 0.082 Study phase Retrospective Prospective 179 /1443 (12.4) 162 /1404 (11.5) 0.93 0.92 0.84 (0.64 - 1.10) 0.19 1.37 1.43 (1.35 - 1.50) <0.0001 1.21 1.27 (0.91 - 1.76) Fine score (°) 90-100 to >200 Previous antibacterial treatment No 268 /2312 (11.6) Yes 72 / 527 (13.7) 1.18 0.15 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for death versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values. Online Table XIV - Mortality during first therapy cycle according to study phase, Fine score, antibacterial treatment in the previous 2 weeks, and compliance with therapeutic recommendations. Sensitivity analysis excluding patients from nursing residence. Factor Level Death rate N (%) Unadjusted RR (*) OR (*) Adjusted (a) OR (*) (95%CI) P (^) Compliance with therapeutic guidelines No Yes 172 /1500 (11.5) 79 / 966 (8.2) 0.71 0.69 0.74 (0.53 - 1.03) 0.076 Study phase Retrospective Prospective 132 /1247 (10.6) 119 /1219 (9.8) 0.92 0.91 0.83 (0.61 - 1.13) 0.23 1.37 1.44 (1.35 - 1.52) <0.0001 1.27 1.43 (0.98 - 2.07) Fine score (°) 91-100 to >200 Previous antibacterial treatment No Yes 197 /2013 (9.8) 54 / 447 (12.1) 1.23 0.063 a) for all other factors in this table (fixed effects) and Center (random effect). *) risk ratio (RR) and odds ratio (OR) for death versus first level. ^) Wald chi-square test (multiple logistic regression). °) as numerical variable on a 10-unit scale; OR is estimated for each 10-unit increase over the whole range of values.