Table 3 Results of parametric survival models for incident hookworm, Ascaris and Trichuris infections (with random effects)

Sex

Female

Ref.

Ref.

Ref.

Male

1.39 (1.11, 1.73)

0.004

1.10 (0.94, 1.19)

0.234

1.22 (1.031, 1.44)

0.018

Age

5–8 Years

Ref.

Ref.

Ref.

8–12 Years

1.12 (0.87, 1.45)

0.361

1.07 (0.88, 1.32)

0.489

0.88 (0.73, 1.05)

0.156

13–30 Years

1.02 (0.72, 1.46)

0.872

1.13 (0.87, 1.46)

0.364

0.62 (0.46, 0.84)

0.002

More than 30 years

0.95 (0.70, 1.28)

0.738

1.11 (0.87, 1.41)

0.412

0.53 (0.40, 0.70)

 < 0.001

Treatment

Zero doses per year

0.79 (0.51, 1.22)

0.290

0.62 (0.42, 0.91)

0.001

0.78 (0.53, 1.13)

0.190

One dose per year

Ref.

Ref.

Ref.

Two doses per year

0.97 (0.70, 1.33)

0.828

1.10 (0.80, 1.50)

0.559

1.14 (0.85, 1.54)

0.385

Random effects

Village

 < 0.001

Village

 < 0.001

Household

 < 0.001

ICC

31.4%

45.7%

42.9%

Model

Distribution

Log logistic

Log normal

Log logistic

AIC

505.5

626.5

718.4

Log likelihood

− 243.7

− 304.2

− 350.2

Key survival data

Number of subjects

102

177

194

PY

420

727

772