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Table 3 Negative binomial regression analysis assessing the association between risk factors and the number of RDT-positive individuals found among reactive case detection participants

From: The use of spatial and genetic tools to assess Plasmodium falciparum transmission in Lusaka, Zambia between 2011 and 2015

Variable

Factor

Unadjusted IRR (95% CI)

P-value

Adjusted IRR (95% CI)

P-value

Season and distance from uninhabited areas

Dry season > 250 m

Reference

Reference

Reference

Reference

Dry season and ≤ 250 m

1.77 (0.79–3.94)

0.119

1.82 (0.81–4.10)

0.147

Wet season and > 250 m

1.95 (0.84–4.54)

0.164

2.06 (0.88–4.81)

0.096

Wet season and ≤ 250 m

2.06 (0.97–4.39)

0.061

2.14 (0.99–4.59)

0.051

Age of index case

< 5 years

Reference

Reference

Reference

Reference

5–15 years

1.20 (0.76–1.88)

0.432

1.20 (0.76–1.89)

0.441

> 15 years

1.36 (0.88–2.11)

0.164

1.37 (0.88–2.12)

0.163

Sex of index case

Female

Reference

Reference

Reference

Reference

Male

1.22 (0.85–1.76)

0.287

1.20 (0.83–1.74)

0.342

Index case travelled in the past month

None

Reference

Reference

Reference

Reference

Outside Lusaka

0.81 (0.48–1.37)

0.437

0.76 (0.44–1.29)

0.302

  1. N = 428 case investigations