The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

The clinically evaluable (CE) analysis set included all patients who met the disease definition of cIAI and met the stringent criteria for clinical evaluation described in the protocol regarding dosing, concomitant medication, evaluation, etc.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

Extended microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

Extended microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

Extended microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

The microbiological modified intent-to-treat mMITT analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

The microbiological modified intent-to-treat mMITT analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

The microbiological modified intent-to-treat mMITT analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

The clinically evaluable (CE) analysis set included all patients who met the disease definition of cIAI and met the stringent criteria for clinical evaluation described in the protocol regarding dosing, concomitant medication, evaluation, etc.

The proportion of patients meeting the cure criteria: complete resolution or significant improvement of signs and symptoms of the index infection such that no further antibacterial therapy, drainage, or surgical intervention was necessary.

The clinically evaluable (CE) analysis set included all patients who met the disease definition of cIAI and met the stringent criteria for clinical evaluation described in the protocol regarding dosing, concomitant medication, evaluation, etc.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

Extended microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

Extended microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

Extended microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

The microbiological modified intent-to-treat (mMITT) analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

The microbiological modified intent-to-treat (mMITT) analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

Per-patient "favorable" response indicates that all of the patient's baseline pathogens are "eradicated" or "presumed eradicated".

The microbiological modified intent-to-treat (mMITT) analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

The mMITT analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

The mMITT analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

The mMITT analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

Extended microbiologically evaluable(ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

Extended microbiologically evaluable(ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

The proportion of patients with a favorable per-pathogen microbiological response: favourable microbiological response includes: Eradication Absence of causative pathogen from specimens at the site of infection. Presumed eradication where, repeat cultures were not performed/clinically indicated in a patient who had a clinical response of cure.

Extended microbiologically evaluable(ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

The microbiological responses as per the protocoled criteria: responses other than "indeterminate" were classified as "favorable" or "unfavorable." Favorable microbiological response assessments included "eradication" and "presumed eradication." Unfavorable microbiological response assessments included "persistence," "persistence with increasing minimum inhibitory concentration (MIC)," and "presumed persistence." Indeterminate microbiologic response assessments included cases where the clinical response was changed to indeterminate due to an SRP assessment of inadequate source control (ie, circumstances that preclude classification as eradication, presumed eradication, persistence, persistence with increasing MIC, and presumed persistence).

The microbiological modified intent-to-treat (mMITT) analysis set included all randomized patients who met the disease definition of cIAI and had at least 1 etiologic pathogen identified at study entry (regardless of isolate susceptibilities). Patients with a bacterial species typically not expected to respond to both study drugs were excluded.

The microbiological responses as per the protocoled criteria: responses other than "indeterminate" were classified as "favorable" or "unfavorable." Favorable microbiological response assessments included "eradication" and "presumed eradication." Unfavorable microbiological response assessments included "persistence," "persistence with increasing minimum inhibitory concentration (MIC)," and "presumed persistence." Indeterminate microbiologic response assessments included cases where the clinical response was changed to indeterminate due to an SRP assessment of inadequate source control (ie, circumstances that preclude classification as eradication, presumed eradication, persistence, persistence with increasing MIC, and presumed persistence).

Microbiologically evaluable (ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture that was susceptible to both treatment groups.

The microbiological responses as per the protocoled criteria: responses other than "indeterminate" were classified as "favorable" or "unfavorable." Favorable microbiological response assessments included "eradication" and "presumed eradication." Unfavorable microbiological response assessments included "persistence," "persistence with increasing minimum inhibitory concentration (MIC)," and "presumed persistence." Indeterminate microbiologic response assessments included cases where the clinical response was changed to indeterminate due to an SRP assessment of inadequate source control (ie, circumstances that preclude classification as eradication, presumed eradication, persistence, persistence with increasing MIC, and presumed persistence).

Extended microbiologically evaluable(ME) analysis set defined as all patients included in the clinically evaluable (CE) set with at least 1 Gram-negative aerobic pathogen in the initial/prestudy culture regardless of susceptibility.

Time to first defervescence was calculated for patients with a fever (>38ºC) at baseline. Defervescence (≤37.8ºC) was defined as the absence of fever based on the highest temperature recorded on each study day. Time to first defervescence while on IV study therapy in the CE analysis set at TOC for patients who had fever at study entry is defined as time (in days) from the first dose of IV study therapy to first absence of fever.

Clinically evaluable (CE) with fever, defined as >38ºC at study entry. No participants were censored at the time of last observation.

Time to first defervescence was calculated for patients with a fever (>38ºC) at baseline. Defervescence (≤37.8ºC) was defined as the absence of fever based on the highest temperature recorded on each study day. Time to first defervescence while on IV study therapy in the CE analysis set at TOC for patients who had fever at study entry is defined as time (in days) from the first dose of IV study therapy to first absence of fever.

microbiological modified intent-to-treat (mMITT) with fever, defined as >38ºC at study entry. No participants were censored at the time of last observation.

Adverse event data were collected from the screening/consent visit until the late follow-up visit (i.e. Day -1/0 to Day 42).

Safety analysis set: all patients who received at least 1 dose of IP

Duration of exposure is calculated as the difference between the last study therapy date and the first study therapy date converted to days plus 1 day. Actual calculated duration could be shorter or longer than a full day.

Safety analysis set: all patients who received at least 1 dose of IP

Potentially clinically significant (PCS) post Baseline hematology values up to LFU (Safety analysis set)

Safety analysis set: all patients who received at least 1 dose of IP

Potentially clinically significant (PCS) post Baseline clinical chemistry values up to LFU (Safety analysis set)

Safety analysis set: all patients who received at least 1 dose of IP

Shifts in ECG interpretation and changes in QT, QTcB, and QTcF intervals , from baseline to post baseline.

Safety analysis set: all patients who received at least 1 dose of IP

Blood samples were taken from all patients on Day 3 for the pharmacokinetic evaluation of ceftazidime and avibactam plasma concentrations

PK analysis set