Table 2 Summary of number of participants at primary vaccination included in the analysis by treatment arm and reference study.

From: Modeling antibody persistence after MenACYW-TT vaccination and comparative analysis with other quadrivalent meningococcal vaccines

Age group

Arm

Study assessing the primary dose

Study assessing the persistence data

N

T1

n (%)

T2

n (%)

T3

n (%)

Adolescents/young adults

MenACYW-TT

Dhingra et al. (NCT02842853)28

Zambrano et al. (NCT04084769)26

139

137

(98.6%)

137 (98.6%)

N/A

Adolescents/young adults

MenACYW-TT

Chang et al. (NCT02199691)27

241

239

(99.2%)

239 (99.2%)

N/A

Adolescents/young adults

MenACWY-CRM

Dhingra et al. (NCT02842853)28

56

3

(5.6%)

3

(5.6%)

N/A

Adolescents/young adults

MenACWY-CRM

Chang et al. (NCT02199691)27

134

132

(98.5%)

132 (98.5%)

N/A

Older adults

MPSV4

Kirstein et al. (NCT01732627)33

Robertson et al. (NCT04142242)29,30

26

26

(100.0%)

26

(100.0%)

N/A

Older adults

MPSV4

Esteves-Jarmillo et al. (NCT02842866)32

170

168

(98.8%)

168 (98.8%)

23

(13.5%)

Older adults

MenACYW-TT

Kirstein et al. (NCT01732627)33

60

58

(96.7%)

58

(96.7%)

N/A

Older adults

MenACYW-TT

Esteves-Jarmillo et al. (NCT02842866)32

215

212

(98.6%)

212 (98.6%)

28

(13.0%)

Toddlers

MenACYW-TT

Van der Vilet et al. (NCT02955797)35

Martinón-Torres et al. (NCT04936685)34

208

208

(100.0%)

208 (100.0%)

N/A

Toddlers

MenACYW-TT

Vesikari et al. (NCT00427908)25

Piazza et al. (NCT03476135)22

42

42

(100.0%)

42 (100.0%)

N/A

Toddlers

MCV4-TT

Vesikari et al. (NCT00427908)25

49

49

(100.0%)

49 (100.0%)

N/A

  1. The first vaccine time point (T1) was recorded at 30 days after primary vaccination; the first long-term persistence data point (T2) was recorded at 3 years after primary vaccination for older adults and between 3 and 7 years after primary vaccination for adolescents/young adults and toddlers; an additional long-term persistence data point (T3) was also recorded at 5 years after primary vaccination in older adults who received MPSV4 or MenACYW-TT. N/A, not available.