Table 2 Mixed effects logistic regression

From: Role of monkeys in the sylvatic cycle of chikungunya virus in Senegal

Covariate

OR (95% CI)

Intercept (β0)

0.26 (0.05, 1.24)

Age

2.14 (1.84, 2.50)

Erythrocebus patas

0.18 (0.05, 0.66)

Papio papio

1.18 (0.45, 3.13)

Feb. collection

1.51 (0.19, 11.78)

Mar. collection

0.84 (0.17, 4.23)

Apr. collection

1.34 (0.23, 7.81)

May collection

1.86 (0.25, 13.87)

Dec. collection

2.32 (0.28, 19.35)

Random intercept for Troop (b0)

0.72 (−0.69, 2.12)

ICC

0.135

  1. Table reports the estimates from a mixed effects logistic regression with CHIKV IgG seropositivity as the outcome and monkey age, species, month of collection as fixed effects and troop (same collection site and date) as a random intercept. Intercept corresponds to 0.26 probability of IgG positivity in the first year of life in Chlorocebus sabaeus primates collected in January, with the random effect indicating 95% of Chlorocebus sabaeus primate infants (<1-year-old) collected in January have PRNT80 positivity rates between 0.060 and 0.52 (\({\rm{exp}}\left( {{\beta _0} \pm 1.96 \cdot {b_0}} \right)\)/\(\left[ {1 + {\rm{exp}}\left( {{\beta _0} \pm 1.96 \cdot {b_0}} \right)} \right]\)). ICC is the intraclass correlation for the random effect, and indicates about 13.5% of the total observed variance is due to variance within NHP troops
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