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Table 1 Results of posterior means with 95% credible intervals of individual-level covariates estimated by the multinomial ordered probit model

From: Rate of decline of antibody titers to pandemic influenza A (H1N1-2009) by hemagglutination inhibition and virus microneutralization assays in a cohort of seroconverting adults in Singapore

Factor

By HI assay

By MN assay

Posterior mean

95% credible interval

Posterior mean

95% credible interval

Age ≥ 55 years (versus age < 55 years)

1.06

(−1.12, 3.53)

1.21

(−1.18, 3.78)

Female (versus male)

1.37

(0.06, 2.71)

0.49

(−0.96, 1.98)

Any symptoms

2.07

(0.38, 3.84)

3.53

(1.60, 5.55)

Sample B (versus sample A)

−2.96

(−4.24, −1.72)

−0.90

(−1.95, 0.18)

Sample C (versus sample A)

−3.54

(−4.96, −2.19)

−2.31

(−3.49, −1.15)

Interaction terms

    

Age ≥ 55 years with sample B

−1.28

(−3.02, 0.40)

−2.99

(−4.57, −1.46)

Age ≥ 55 years with sample C

−3.40

(−5.28, −1.57)

−2.77

(−4.30, −1.26)

Female with sample B

−1.44

(−2.37, −0.50)

0.66

(−0.19, 1.50)

Female with sample C

−1.35

(−2.35, −0.37)

0.58

(−0.26, 1.46)

Any symptoms with sample B

−0.66

(−1.89, 0.55)

−1.63

(−2.77, −0.54)

Any symptoms with sample C

−0.53

(−1.84, 0.79)

−0.67

(−1.82, 0.47)