E-RS: COPD is a subset of Exacerbations of Chronic pulmonary Disease Tool (EXACT). E-RS is a tool that consists of 11 items from the 14 item EXACT instrument. The domains include: respiratory symptoms (RS)-breathlessness (RS-BRL comprised of 5 items, score range \[0-17\]), RS-cough and sputum (RS-CSP comprised of 3 items, score range \[0-11\]), and RS-chest symptoms (RS-CSY comprised of 3 items, score range \[0-12\]). The total score ranged between 0-40 and higher values indicates severe respiratory symptoms. Day 1 was considered as Baseline. Change from Baseline was calculated by subtracting Baseline value from the specified time point value. Per protocol population included all participants from the mITT population who did not have a protocol deviation considered to impact efficacy. Posterior mean change and standard deviation has been presented.

E-RS: COPD is a subset of EXACT. E-RS is a tool that consists of 11 items from the 14 item EXACT instrument. The domains include: RS-BRL comprised of 5 items, score range (0-17), RS-CSP comprised of 3 items, score range (0-11), and RS-CSY comprised of 3 items, score range (0-12). The total score ranged between 0-40 and higher values indicates severe respiratory symptoms. Day 1 was considered as Baseline. Change from Baseline was calculated by subtracting Baseline value from the specified time point value. Posterior mean change and standard deviation has been presented.

E-RS: COPD is a subset of EXACT. E-RS is a tool that consists of 11 items from the 14 item EXACT instrument. The domains include: RS-BRL comprised of 5 items, score range (0-17), RS-CSP comprised of 3 items, score range (0-11), and RS-CSY comprised of 3 items, score range (0-12). The total score ranged between 0-40 and higher values indicates severe respiratory symptoms. Day 1 was considered as Baseline. Change from Baseline was calculated by subtracting Baseline value from the specified time point value. Posterior mean change and standard deviation has been presented.

E-RS: COPD is a subset of EXACT. E-RS is a tool that consists of 11 items from the 14 item EXACT instrument. The domains include: RS-BRL comprised of 5 items, score range (0-17), RS-CSP comprised of 3 items, score range (0-11), and RS-CSY comprised of 3 items, score range (0-12). The total score ranged between 0-40 and higher values indicates severe respiratory symptoms. Day 1 was considered as Baseline. Change from Baseline was calculated by subtracting Baseline value from the specified time point value. Posterior mean change and standard deviation has been presented.

AE is any untoward medical occurrence in a participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. SAE is any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect or any other situation according to medical or scientific judgment is categorized as SAE.

Blood samples were collected from participants for analysis of following hematology parameters with PCI low and high values: Basophils % (High 5.00x), Eosinophils % (High 2.00x), Mean corpuscular hemoglobin concentration (MCHC) gram per deciliter (g/dL) (Low 0.85x, high 1.10x), Mean corpuscular hemoglobin (MCH) picograms (pg) (Low 0.85x, high 1.20x), Mean corpuscular volume (MCV) femtoliter (fL) (low 0.25x, high 2.00x), Erythrocytes (Ery.)(10\^12cells/L) (Low 0.93x, high 1.07x), Hematocrit (Ratio of 1) (Low 0.50x, high 0.50x), Hemoglobin gram per liter (g/L) (Low 0.85x, high 1.20x), Leukocytes (x10\^9/L) (Low 0.70x, high 1.60x), Lymphocytes % (Low 0.80x, high 1.20x), Monocytes % (Low 0.80x, high 1.60x), Neutrophils % (Low 0.65x, high 1.50x), Platelets (x10\^9cells/L) (Low 0.90x, high 1.10x). Multipliers are identified by "x", otherwise actual comparison values are provided with units. Values above and below this range were considered of PCI.

Blood samples were collected from participants for analysis of following chemistry parameters with PCI low and high values: Alanine aminotransferase (ALT) International units per liter (IU/L) (High =\> 3x ULN), Alkaline phosphatase (ALP) (IU/L) (High ≥ 2x ULN); Aspartate aminotransferase (AST) (IU/L) (High=\> 3x ULN); Bilirubin micromole per liter (umol/L) (High ≥ 2x ULN); Calcium millimole per liter (mmol/L) (Low 0.85x, high 1.08x), Chloride (mmol/L) (Low 0.90x, high 1.10x), Creatinine (umol/L) (High 1.30x), Direct bilirubin (umol/L) (High ≥ 2x ULN), Glucose (mmol/L) (Low \<0.6x, high \>4x), Potassium (mmol/L) (Low 0.75x, high 1.30x); Protein (g/L) (High 1.25x), Sodium (mmol/L) (Low 0.80x, high 1.15x), Multipliers are identified by "x", otherwise actual comparison values are provided with units. Values above and below this range were considered of PCI.

Vital signs parameters includes systolic blood pressure (SBP) and diastolic blood pressure (DBP), pulse rate and respiration rate were measured in a semi-supine position after 5 minutes rest for the participants at indicated time points. PCI ranges for vital signs parameters were as follows: \<90 to \>160 millimeters of mercury (mmHg) for SBP and \<40 to \>110 mmHg for DBP, \<35 or \>120 beats per minute for heart rate and \<8 or \>30 breaths per minute for respiration rate. Values above and below this range were considered of PCI.

Triplicate 12-lead ECG obtained to measure PR, QRS, QT, and Corrected QT intervals. Only those participants with worst case post-Baseline data have been represented for abnormal - not clinical significant and abnormal - clinical significant. Day 1 was considered as Baseline.

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect, any other situation according to medical or scientific judgment that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require medical or surgical intervention, events associated with liver injury and impaired liver function were categorized as SAE. Participants with any AE or SAE were summarized. Participants with AE or SAE occurrences \>= 5 percent were summarized. All Subjects Population comprised of all participants who were screened and for whom a record existed on the study database.

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Any untoward event resulting in death, life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, congenital anomaly/birth defect, any other situation according to medical or scientific judgment that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require medical or surgical intervention, events associated with liver injury and impaired liver function were categorized as SAE. Participants with AE or SAE occurrences \>= 5 percent were summarized.

Vital signs including SBP, DBP, pulse rate, respiratory rate and body temperature were taken on Day 1 pre-dose and on Day 14 and at Follow-up (Day 21 to 28) in Part A. Measurements were obtained in a semi-supine/ supine position after 5 minutes rest. The mean of replicate assessments at any given time point was used as the value for that time point. SBP \<90 or \>160 millimeter of mercury (mmHg); DBP \<40 or \>110 mmHg, pulse rate \<35 or \>120 beats per minute (bpm) and respiratory rate \<8 or \>30 breaths per minute were considered as values of potential clinical importance and were presented as 'High' or 'Low' values. Intent-to-Treat (ITT) Population comprised of all randomized par. who received at least one dose of study medication.

Vital signs including SBP, DBP, pulse rate and respiratory rate were taken on Day 1 pre-dose and on Day 28, 56, 112, 168, 280, 364 and at Follow-up (Day 378 to 392) in Part B. Measurements were obtained in a semi-supine/ supine position after 5 minutes rest. The mean of replicate assessments at any given time point was used as the value for that time point. SBP \<90 or \>160 mmHg, DBP \<40 or \>110 mmHg, pulse rate \<35 or \>120 bpm and respiratory rate \<8 or \>30 breaths per minute were considered as values of potential clinical importance and were presented as 'High' or 'Low' values. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

12-lead ECG was taken on Day 1 pre-dose and on Follow-up visit (Day 21 to 28) in Part A using an ECG machine. Triplicate reading were taken on Day 1 pre-dose. Participants with abnormal-clinically not significant (NCS) and abnormal-clinically significant (CS) findings were sumarized.

12-lead ECG was taken on Day 1 pre-dose and on Day 28, 168 and at Follow-up (Day 378 to 392) in Part B using an ECG machine. Participants with abnormal-NCS and abnormal-CS findings were sumarized. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

Blood samples were collected at Screening and Day 14 in Part A to evaluate hematology parameters which included hemoglobin, hematocrit, basophils, eosinophils, lymphocytes, monocytes, neutrophils, mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), mean corpuscular volume (MCV), red blood cell (RBC) count, white blood cell (WBC) count, platelet count and reticulocyte count. Hematology values of potential clinical importance were presented as 'High' or 'Low' values based on the reference laboratory standards.

Blood samples were collected at Screening and on Day 28, 168, and 364 in Part B to evaluate hematology parameters which included hemoglobin, hematocrit, basophils, eosinophils, lymphocytes, monocytes, neutrophils, MCHC, MCH, MCV, RBC count, WBC count, platelet count and reticulocyte count. Hematology values of potential clinical importance were presented as 'High' or 'Low' values based on the reference laboratory standards. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

Blood samples were collected at Screening and Day 14 in Part A to evaluate clinical chemistry parameters which included alanine aminotransferase (ALT), albumin, alkaline phosphatase (ALP), aspartate aminotransferase (AST), total bilirubin, calcium, bicarbonate, chloride, creatinine, direct bilirubin, gamma glutamyl transferase (GGT), glucose, potassium, total protein, sodium, blood urea nitrogen (BUN) and uric acid. Additional liver monitoring chemistry (ALT, AST, ALP and total and direct bilirubin) was done on Day 1 pre-dose. Clinical chemistry values of potential clinical importance were presented as 'High' or 'Low' values based on the reference laboratory standards.

Blood samples were collected at Screening and on Day 28, 168 and 364 in Part B to evaluate clinical chemistry parameters which included ALT, albumin, ALP, AST, total bilirubin, calcium, bicarbonate, chloride, creatinine, direct bilirubin, GGT, glucose, potassium, total protein, sodium, BUN and uric acid. Clinical chemistry values of potential clinical importance were presented as 'High' or 'Low' values based on the reference laboratory standards. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

Test strip urinalysis was done for glucose, ketones, occult blood and protein at Screening and Day 14 in Part A. Results were presented as negative, trace, 1+, 2+ and 3+ for glucose, ketones, occult blood and protein. Only those participants with data available at the specified time points were analyzed (represented by n=X in the category titles).

Test strip urinalysis was done for glucose, ketones, occult blood and protein at Screening and on Day 28, 168, 224 and 364 in Part B. Results were presented as negative, trace, 1+, 2+ and 3+ for glucose, ketones, occult blood and protein. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

Urinalysis including urine pH was done at Screening and Day 14 in Part A. Baseline was considered as the measurement obtained at Screening (Day -1). The change from Baseline was calculated by subtracting the Baseline values from the individual post-randomization values.

Urinalysis including urine pH was done at Screening and on Day 28, 168 and 364 in Part B. Baseline was considered as the measurement obtained at Screening (Day -1). The change from Baseline was calculated by subtracting the Baseline values from the individual post-randomization values. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

Urinalysis including urine specific gravity was done at Screening and Day 14 in Part A. Baseline was considered as the measurement obtained at Screening (Day -1). The change from Baseline was calculated by subtracting the Baseline values from the individual post-randomization values.

Urinalysis including urine specific gravity was done at Screening and on Day 28, 168 and 364 in Part B. Baseline was considered as the measurement obtained at Screening (Day -1). The change from Baseline was calculated by subtracting the Baseline values from the individual post-randomization values.

FEV1 measures how much air a person can exhale during a forced breath in 1 second. FVC is the total amount of air exhaled during the FEV test. FEV1 and FVC were performed at Screening and on Day 1, 14 and at Follow-up visit (Day 21 to 28). FEV1 and FVC assessments at each time point (post-bronchodilator) were taken in triplicate. The maximum of the triplicate assessments were used. Baseline was considered as the measurement obtained at Day 1 pre-dose. The change from Baseline was calculated by subtracting the Baseline values from the individual post-randomization values.

FEV1 and FVC were performed at Screening and on Day 1, 28, 56, 112, 168, 280, 364 and at Follow-up (Day 378 to 392) in Part B. FEV1 and FVC assessments at each time point (post-bronchodilator) were taken in triplicate. The maximum of the triplicate assessments were used. Baseline was considered as the measurement obtained at Day 1 pre-dose. The change from Baseline was calculated by subtracting the Baseline values from the individual post-randomization values. Statistical analysis was performed using a repeated measures mixed effects model in a Bayesian framework. The estimate of the treatment difference and corresponding 95 percent credible interval was constructed for the difference between danirixin and placebo for each visit. Only those participants available at the specified time points were analyzed (represented by n=X, X in the category titles).

Cmax of danirixin was derived from the Pharmacokinetics (PK) samples collected at pre-dose and at 0.5, 1, 2, 4, 6, 8, 10 and 12 hour post-dose on Day 1 and Day 14 in Part A. PK analysis of danirixin was conducted by non-compartmental methods. PK Concenteration Population comprised of par. in the ITT Population and who had provided at least one on-treatment blood sample for determination of danirixin concentration.

Tmax of danirixin was derived from the PK samples collected at pre-dose and at 0.5, 1, 2, 4, 6, 8, 10 and 12 hour post-dose on Day 1 and Day 14 in Part A. PK analysis of danirixin was conducted by non-compartmental methods.

AUC (0-12) of danirixin was derived from the PK samples collected at pre-dose and at 0.5, 1, 2, 4, 6, 8, 10 and 12 hour post-dose on Day 1 and Day 14 in Part A. PK analysis of danirixin was conducted by non-compartmental methods. A Bayesian random effects model was performed adjusting for the trial as a random effect. A non-informative normal prior distribution was used. Point estimates and corresponding 90 percent credible intervals were constructed.

HCRU COPD exacerbations are defined as moderate or severe exacerbations based on requirement of new prescription antibiotics or oral corticosteroids, hospitalization or emergency room visits for management of COPD exacerbation. For par. with less than 364 days on-treatment, the annual exacerbation rate was imputed as the number of recorded on-treatment exacerbations, divided by the number of 4-week treatment period intervals for which the par. was in the study, multiplied by 13. For par. with 364 or more days on-treatment, the annual exacerbation rate was calculated as the number of recorded exacerbations between study days 1 and 364. Statistical analysis was done using a Bayesian Cox model, assuming a negative binomial distribution for the underlying exacerbation rate. The exacerbation rates along with the ratio (danirixin/placebo), were estimated and corresponding 95 percent credible intervals were produced using non-informative priors. 1 par. was excluded from the analysis.

EXACT-RS is a tool which consists of 11 items from the 14 item EXACT- patient reported outcomes (EXACT-PRO) instrument, intended to capture information related to the respiratory symptoms of COPD, i.e. breathlessness, cough, sputum production, chest congestion and chest tightness. The EXACT-RS has a scoring range of 0-40, higher scores indicate more severe symptoms. A par. had at least 10 days of diary data in any month to contribute a non-missing weighted mean AUC of daily values; otherwise the weighted mean for that month were considered missing. A mixed effects model in a Bayesian framework with repeated measures were performed on the EXACT-RS monthly weighted mean AUC data. The posterior mean and corresponding 95 percent credible interval were calculated. Only those participants with data available at the specified time points were analyzed (represented by n=X, X in the category titles).

Blood samples were collected at the indicated time points after administration of study treatment to investigate the pharmacokinetic (PK) profile of Danirixin. PK parameters were calculated by standard non-compartmental analysis using WinNonlin based on actual sampling times.

Blood samples were collected at the indicated time points after administration of study treatment to investigate the PK profile of Danirixin. PK parameters were calculated by standard non-compartmental analysis using WinNonlin based on actual sampling times.

AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a study treatment, whether or not considered related to the study treatment. An SAE is any untoward medical occurrence that, at any dose results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect or is medically significant.

Vital signs included systolic and diastolic blood pressure, temperature, respiratory rate and pulse rate were measured with participants in semi-supine position after 5 minutes rest.

Single 12-lead ECGs were obtained using an ECG machine that automatically calculated the heart rate and measured PR, QRS, and QT intervals, and QT interval corrected by Fridericia's formula (QTcF). Number of participants with 12-lead ECG values of potential clinical concern in Part 1 are presented.

Hematology parameters included platelet count, RBC Count, hemoglobin, hematocrit, MCV, MCH, %Reticulocytes, neutrophils, lymphocytes, monocytes, eosinophils, basophils. Clinical chemistry parameters included potassium aspartate aminotransferase(AST)/Serum Glutamic-Oxaloacetic Transaminase (SGOT), total and direct bilirubin, creatinine, sodium alanine, aminotransferase, (ALT)/ Serum Glutamic-Pyruvic, Transaminase (SGPT), total protein, fasting glucose, calcium, alkaline phosphatase and albumin. Urinalysis included specific gravity, potential of hydrogen (pH), glucose, protein, blood and ketones by dipstick and microscopic examination of urine.