Table 2 Bivariate associations between demographic and health-related variables, and NAb titers after 30 and 180 days of vaccination.

From: Differential persistence of neutralizing antibody against SARS-CoV-2 in post immunized Bangladeshi population

Characteristics

NAb titers after 30 days

NAb titers after180 days

Mean (SD)

p-value (t-test)

p-value (\(\chi^{2}\)-test)*

Mean (SD)

p-value (t-test)

p-value (\(\chi^{2}\)-test)*

Age

 

0.068

0.166

 

0.001

0.013

 < 50 years

84.4 (20.6)

  

57.3 (26.2)

  

 ≥ 50 years

80.6 (23.3)

  

48.4 (28.3)

  

Sex

 

0.481

0.591

 

0.355

0.002

Male

84.0 (21.9)

  

55.8 (28.9)

  

Female

82.6 (20.8)

  

53.6 (24.1)

  

BMI

 

0.012

0.005

 

0.735

0.886

 < 30

82.7 (21.2)

  

54.8 (26.9)

  

 ≥ 30

90.0 (8.1)

  

56.2 (28.4)

  

COVID-19 positive

 

0.001

 < 0.001

 

 < 0.001

 < 0.001

No

81.7 (22.3)

  

52.3 (26.8)

  

Yes

88.9 (17.6)

  

63.1 (26.2)

  

Profession

 

0.022

0.004

 

0.488

0.525

Medical staff

85.8 (20.1)

  

54.2 (27.5)

  

University faculty staff

81.5 (22.3)

  

55.8 (26.4)

  

Tobacco user

 

0.014

0.936

 

 < 0.001

0.012

No

84.5 (19.5)

  

57.4 (25.9)

  

Yes

78.6 (27.9)

  

44.2 (29.3)

  

Comorbidities

      

Type 2 Diabetes

 

0.016

0.019

 

0.215

0.120

No

82.6 (22.3)

  

55.4 (27.4)

  

Yes

89.5 (12.2)

  

51.0 (23.4)

  

Hypertension

 

0.336

0.003

 

0.015

0.203

No

82.9 (21.7)

  

56.5 (26.7)

  

Yes

85.0 (20.7)

  

50.0 (27.4)

  

Asthma

 

0.695

0.415

 

 < 0.001

0.045

No

83.6 (21.0)

  

59.1 (24.5)

  

Yes

82.6 (23.5)

  

37.4 (30.1)

  
  1. SD standard deviation, Nab neutralizing antibody.
  2. *p-values for chi-square test were calculated from the differentials in Nab titer categories (< 70, 70–95, ≥ 96) by different socio demographics and health-related variables included in Table 2.
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