The analysis was performed for the serogroups -MenA, -MenC -MenW-135 and -MenY. Antibody titers, tabulated as geometric mean titers (GMTs), were obtained by serum bactericidal assay using rabbit complement. This analysis was only performed on groups receiving Nimenrix vaccine.

The antibody concentrations were calculated as geometric mean concentrations (GMCs) and expressed as Enzyme-linked Immunosorbent Assay (ELISA) units per milliliter (EU/mL).

The antibody concentrations were calculated as geometric mean concentrations (GMCs) and expressed as International Units per milliliter (IU/mL). This analysis was only performed on the groups receiving Boostrix vaccine.

The antibody concentrations were tabulated as GMCs and expressed as IU/mL. GMCs were only analyzed in subjects receiving Boostrix vaccination.

The antibody concentrations were calculated as geometric mean concentrations (GMCs) and expressed as international units per milliliter (IU/mL). The reference cut-off value was an antibody concentration ≥ 1 IU/mL. The primary outcome results only refer to Nimenrix+Boostrix Group and Boostrix Group.

Vaccine response was defined as: rSBA antibody titers greater than or equal to (≥) 1:32, for initially seronegative subjects \[i.e. pre-vaccination rSBA antibody titers below (\<) 1:8\] and at least a 4-fold increase in rSBA antibody titers from pre to post-vaccination, for initially seropositive subjects (i.e. pre-vaccination rSBA antibody titers ≥ 1:8).

Vaccine response was defined as: hSBA antibody titers ≥ 1:8, for initially seronegative subjects (i.e. pre-vaccination rSBA antibody titers \< 1:4) and at least a 4-fold increase in hSBA antibody titers from pre to post-vaccination, for initially seropositive subjects (i.e. pre-vaccination rSBA antibody titers ≥ 1:4).

Vaccine response for serum bactericidal assay using rabbit complement (rSBA) antibodies against Neisseria meningitides serogroups A, C , W-135, Y (rSBA-MenA, rSBA-MenC, rSBA-MenW-135 and rSBA-MenY) was defined as: for initially seronegative subjects \[rSBA titer below (\<) 1:8\], post-vaccination rSBA titer greater than or equal to (≥) 1: 32; for initially seropositive subjects with rSBA titer between 1:8 and 1:128, at least four-fold increase in rSBA titer from pre to post vaccination; and for initially seropositive subjects with rSBA titer ≥1:128, at least two-fold increase in rSBA titer from pre to post vaccination.

The cut-off value for the assay was greater than or equal to (≥) 1:8, as measured at the GlaxoSmithKline (GSK) laboratory.

The cut-off value for the assay was ≥ 1:8. The analysis of this endpoint was performed by GSK.

The cut-off value for the assay was ≥ 1:8. The rSBA-MenA results for the Year 3 time point were obtained by re-testing the samples in parallel at Public Health England (PHE).

Concentrations are presented as geometric mean concentrations (GMCs), expressed in micrograms per milliliter (µg/mL). Anti-pneumococcal serotypes assessed were Anti-1, Anti-4, Anti-5, Anti-6B, Anti-7F, Anti-9V, Anti-14, Anti-18C, Anti-19F and Anti-23F via the 22F-inhibition Enzyme Linked Immunosorbent Assay (ELISA).

The cut-off value for the rSBA titers was greater than or equal to (≥) 1:8.

Antibody titers are presented as geometric mean titers (GMTs) and are measured in titers.

The cut-off for the assay was greater than or equal to (≥) 1:8. The analysis was based only on subjects receiving Nimenrix vaccination at Day 0.

The analysis was based only on subjects receiving Infanrix-hexa vaccination. The results were calculated as geometric mean expressed in enzyme-linked immunosorbent assay (ELISA) units per milliliter (EL.U/mL).

The cut-off for the assay was greater than or equal to (≥) 10 milli-interantional units per milliliter (mIU/mL).

The cut-off for the assay was ≥ 1μg/mL.

The cut-off values for the rSBA titers were ≥ 1:8. The analysis was performed only on subjects receiving meningitis vaccination (Nimenrix) at Day 0.

The cut-off values for anti-measles antibody concentrations were ≥ 150 milli-international units per milliliter (mIU/mL).

The cut-off values for anti-mumps antibody concentrations were ≥ 231 units per milliliter (U/mL).

The cut-off values for anti-rubella antibody concentrations were ≥ 4 international units per milliliter (IU/mL).

The cut-off values for anti-varicella antibody concentrations were ≥ 1:4.

Vaccine response induced by Neisseria meningitidis serogroups A, C, W-135 and Y (MenA, MenC, MenW-135 and menY) as measured by serum bactericidal antibodies using baby rabbit complement (rSBA), was defined as an rSBA titer of at least 1:32 in subjects initially seronegative \[rSBA titer below (\<) 1:8\] and as a 4-fold increase in titer in subjects initially seropositive \[rSBA titer greater than or equal to (≥) 1:8\].

General symptoms assessed included fatigue, fever (defined as axillary temperature), gastrointestinal symptoms and headache. Grade 3 symptom= event that prevented normal activities. Grade 3 fever= temperature above (\>) 39.5 degrees Celsius (°C).

Titers were expressed as geometric mean antibody titers and were calculated on all subjects from both cohorts receiving 1 dose of Nimenrix vaccine lot A, B or C.

Vaccine response was defined as a rSBA titer of at least 1:32 in initially seronegative subjects (\<1:8) and as 4-fold increase in titer in initially seropositive subjects (≥1:8). A seronegative subject had antibody titer below 1:8 prior to vaccination and a seropositive subject had antibody titer equal to or above 1:8 prior to vaccination. Vaccine response was assessed for subjects of both cohorts receiving the Nimenrix vaccine (lot A without co-administration of Fluarix vaccine, lot B and lot C) or the Mencevax ACWY vaccine.

Titers were expressed as geometric mean antibody titers and were calculated on all subjects receiving 1 dose of Nimenrix vaccine lot A co-administered with Fluarix vaccine and on subjects receiving 1 dose of Nimenrix vaccine among all the manufactured lots (pooled groups from the Flu vaccine cohort).

Titers were expressed as geometric mean antibody titers and were calculated on all subjects receiving 1 dose of Fluarix vaccine in the Flu vaccine cohort. The 3 influenza virus strains represented in the vaccine were A/H1N1, A/H3N2, and B.

Seroconversion was defined as the percentage of subjects with either a pre-vaccination HI titer \<1:10 and a post-vaccination titer \>1:40, or a pre-vaccination titer \>1:10 and a minimum 4-fold increase at post-vaccination titer, for each vaccine strain. Seroconversion was calculated on all subjects receiving 1 dose of Fluarix vaccine in the Flu vaccine cohort. The 3 influenza virus strains represented in the vaccine were A/H1N1, A/H3N2, and B.

Conversion factor defined as the fold increase in serum HI Geometric Mean Titers 1 month after vaccination compared to pre-vaccination, for each vaccine strain. Conversion factor was calculated on all subjects receiving 1 dose of Fluarix vaccine in the Flu vaccine cohort. The 3 influenza virus strains represented in the vaccine were A/H1N1, A/H3N2, and B.

Seroprotection was defined as the percentage of subjects with a serum HI titer ≥ 1:40 after vaccination (for each vaccine strain) that usually is accepted as indicating protection. Seroprotection was calculated on all subjects receiving 1 dose of Fluarix vaccine in the Flu vaccine cohort. The 3 influenza virus strains represented in the vaccine were A/H1N1, A/H3N2, and B.

Vaccine response was defined as: * for initially seronegative subjects \[with hSBA titer below (\<) 1:4\]: post-vaccination antibody titer greater than or equal to (≥) 1:8 one month after vaccination; * for initially seropositive subjects (with hSBA titer ≥ 1:4): post-vaccination antibody titer ≥ 4-fold the pre-vaccination antibody titer one month after vaccination.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was greater than or equal to ( ≥) 1:8.

hSBA antibody titers were assessed for the MenA, MenC, MenW-135, and MenY serogroups respectively. The antibody cut-off value assessed was ≥ 1:8.

For each antibody assessed (serogroups A, C, W, and Y) at the corresponding time point, titers were expressed as geometric mean titers (GMTs) and tabulated with 95% confidence intervals (CIs).

The cut-off value for the hSBA titers was greater than or equal to (≥) 1:8.