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Table 2 Summary results of LF studies in 12 districts of Sierra Leone at baseline, midterm and pre-TAS

From: Progress on elimination of lymphatic filariasis in Sierra Leone

Districts by Evaluation unit

Baseline survey 2007–2008 (95% CI)

Midterm 2011 (95% CI)

Pre-TAS 2013 (95% CI)

n

mf Prev (%)

AMD-all (mf/ml)

AMD-positive (mf/ml)

n

mf Prev (%)

AMD-all (mf/ml)

AMD-positive (mf/ml)

n

mf Prev (%)

AMD-all (mf/ml)

AMD-positive (mf/ml)

Overall

8233

2.6 (2.3–3.0)

1.32 (1.00–1.65)

50.90 (40.25–61.62)

6023

0.30 (0.19–0.47)

0.05 (0.03–0.08)

17.59 (15.64–19.55)

4230

0.54 (0.36–0.81)

1.04 (0.30–1.77)

137.12 (88.80–185.44)

By Sex

 Male

3863

3.3 (2.8–3.9)

1.83 (1.21–2.44)

55.08 (39.00–71.15)

3170

0.35 (0.19–0.62)

0.06 (0.03–0.10)

18.18 (14.80–21.56)

2275

0.70 (0.43–1.14)

1.36 (0.08–2.64)

115.56 (60.68–170.43)

 Female

4370

2.0 (1.6–2.4)

0.88 (0.59–1.18)

44.76 (32.89–56.64)

2853

0.25 (0.12–0.51)

0.04 (0.01–0.07)

16.67 (-)

1955

0.36 (0.17–0.74)

0.66 (0.08–1.23)

183.33 (70.06–296.60)

By district and sites

1

Bo

1005

2.0 (1.3–3.1)

1.97 (0.84–3.11)

99.17 (58.32–140.01)

500

0 (0–0.76)

–

–

350

0.29 (0.05–1.60)

0.29 (0.00–0.85)

100 (-)

Pujehun

624

0 (0–0.6)

–

–

500

0 (0–0.76)

–

–

305

0.33 (0.06–1.83)

0.11 (0.00–0.32)

33.33 (-)

2

Bonthe

504

1.2 (0.6–2.6)

0.83 (0.02–1.63)

69.44 (13.68–125.21)

499

0.20 (0.04–1.13)

0.03 (0–0.10)

16.67 (-)

309

0 (0–1.23)

–

–

Moyamba

500

1 (0.4–2.3)

0.67 (0–1.36)

66.67 (6.33–127.00)

500

0 (0–0.76)

–

–

330

0 (0.00–1.15)

–

–

3

Kambia

619

2.1 (1.2–3.6)

0.97 (0.23–1.71)

46.15 (17.04–75.27)

500

0.40 (0.11–1.45)

0.07 (0–0.16)

16.67 (-)

300

0 (0–1.26)

–

–

Port Loko

500

4.4 (2.9–6.6)

3.53 (1.48–5.59)

80.30 (44.49–116.12)

499

0.20 (0.04–1.13)

0.03 (0–0.10)

16.67 (-)

357

0.28 (0.05–1.57)

0.56 (0.00–1.66)

200 (-)

4

Kono

875

2.4 (1.6–3.6)

1.11 (0.37–1.84)

46.03 (20.09–71.97)

499

0 (0–0.76)

0

0

320

0.63 (0.17–2.25)

0.89 (0.00–2.44)

141.67 (0.00–1518.17)

Tonkolili

500

2.4 (1.4–4.2)

0.63 (0.24–1.03)

26.39 (17.99–34.79)

523

0.19 (0.03–1.08)

0.03 (0–0.10)

16.67 (-)

316

0 (0–1.20)

–

–

5

Bombali 2

–

–

–

–

–

–

–

–

303

0 (0–1.25)

–

–

Bombali 1

830

6.9 (5.3–8.8)

1.93 (1.28–2.57)

28.07 (21.70–34.44)

506

1.58 (0.80–3.09)

0.26 (0.08–0.45)

16.67 (-)

337

2.67 (1.41–5.00)

8.21 (0.00–16.93)

175.00 (57.95–292.05)

Koinadugu

636

5.7 (4.1–7.7)

1.99 (0.95–3.04)

35.19 (19.83–50.54)

498

0.80 (0.31–2.05)

0.17 (0–0.34)

20.83 (7.57– 34.09)

305

0.98 (0.34–2.85)

1.15 (0.00–2.51)

116.67 (7.13–226.21)

6

Kailahun

624

2.6 (1.6–4.1)

2.08 (0.00–4.89)

81.25 (0.00–195.58)

499

0.20 (0.04–1.13)

0.03 (0–0.10)

16.67 (-)

385

1.56 (0.72–3.36)

1.69 (0.00–3.46)

108.33 (2.37–214.29)

Kenema

1016

0.6 (0.3–1.3)

0.34 (0.00–0.70)

58.33 (4.42–112.24)

500

0 (0–0.76)

–

–

313

0 (0–1.21)

–

–