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Table 2 Domestic fly abundance in study house toilets at different times of the year

From: Effect of a novel house (Star home) and toilet design on domestic fly densities in rural Tanzania

Domestic fly species

House type

No. trap collections

Total caught

Unadjusted mean (95% CI)

Adjusted mean

(95% CI)

Adjusted RR

(95% CI)

% reduction

p

Dry season (June–November)

 Chrysomya putoria

Traditional house

182

4610

24.8 (19.89–29.71)

20.21 (12.11–33.74)

1

  

Star homes

182

2390

13.1 (9.64–16.56)

9.57 (5.69–16.08)

0.47 (0.35–0.63)

53

 < 0.001

 Musca domestica

Traditional house

182

236

1.27 (0.86–1.68)

1.06 (0.61–1.85)

1

  

Star homes

182

224

1.23 (0.76–1.70)

0.91 (0.52–1.61)

0.86 (0.55–1.34)

14

0.501

 Sarcophaga species

Traditional house

182

349

1.88 (1.46–2.30)

1.87 (1.34–2.60)

1

  

Star homes

182

379

2.08 (1.74–2.42)

1.97 (1.41–2.74)

1.06 (0.62–1.15)

6

0.707

Wet season (December–May)

 Chrysomya putoria

Traditional house

154

6731

44.0 (34.21–53.79)

35.87 (15.30–84.11)

1

  

Star homes

154

4189

27.2 (21.25–33.15)

17.73 (7.57–41.48)

0.49 (0.36–0.69)

41

 < 0.001

 Musca domestica

Traditional house

154

1536

10.0 (6.02–13.08)

2.90 (1.00–8.42)

1

  

Star homes

154

1511

9.81 (6.29–13.33)

2.24 (0.77–6.48)

0.78 (0.53–1.12)

22

0.175

 Sarcophaga species

Traditional house

154

585

3.82 (2.78–4.86)

2.78 (1.32–5.86)

1

  

Star homes

154

471

3.06 (2.33–3.79)

2.30 (1.01–4.85)

0.83 (0.59–1.15)

17

0.263

Dry and wet seasons (January 2022–December 2023)

 Chrysomya putoria

Traditional house

336

11,341

33.5 (28.23–38.77)

24.96 (15.25–40.86)

1

  

Star homes

336

6579

19.6 (16.21–22.99)

12.72 (7.74–20.90)

0.51 (0.41–0.63)

49

 < 0.001

 Musca domestica

Traditional house

336

1772

5.23 (3.75–6.71)

1.89 (0.89–4.00)

1

  

Star homes

336

1735

5.16 (3.47–6.85)

1.55 (0.73–3.29)

0.82 (0.61–1.11)

19

0.198

 Sarcophaga species

Traditional house

336

934

2.76 (2.23–3.29)

2.22 (1.42–3.47)

1

  

Star homes

336

850

2.53 (2.14–2.92)

2.05 (1.31–3.21)

0.93 (0.74–1.16)

7

0.495

  1. RR = risk ratio, CI = 95% confidence intervals, p = probability