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Table 2 Arithmetic mean egg count (EPG) (95% CI) in school-age children in 2016 in Sierra Leone

From: Soil-transmitted helminth infection in school age children in Sierra Leone after a decade of preventive chemotherapy interventions

  Arithmetic mean EPG in 2016 P value 2016 vs 2009b
n Ascaris lumbricoides Trichuris trichiura Hookworm A. lumbricoides T. trichiura Hookworm
Overall 3632 14.41 (4.60–29.43) 3.38 (0.41–10.88) 45.53 (36.38–55.24)    
By District
 Bo 294 0.0 (0.0–0.0) 0.08 (0–0.24) 15.92 (6.59–25.25) 0.002 0.001 0.000
 Bombali 244 58.72 (0–150.57) 3.54 (0–8.17) 163.87 (59.20–268.53) 0.000 NS 0.001
 Bonthe 251 1.15 (0.16–2.14) 3.06 (0–7.77) 67.60 (43.55–91.66)    
 Kailahun 298 1.61 (0.39–2.83) 32.05 (0–94.82) 18.52 (3.63–33.42) NS 0.001 0.001
 Kambia 250 7.20 (3.71–10.69) 0.0 (0.0–0.0) 0.48 (0–1.05)    
 Kenema 301 2.07 (0–6.15) 0.24 (0–0.71) 3.83 (1.80–5.85) NS NS 0.000
 Koinadugu 300 6.96 (3.62–10.30) 0.0 (0.0–0.0) 35.28 (20.03–50.53) 0.000 0.002 0.002
 Kono 242 2.18 (0.83–3.54) 0.79 (0–1.71) 51.37 (0.29–102.46) 0.000 NS 0.000
 Moyamba 252 6.00 (0.54–11.46) 0.19 (0–0.46) 45.81 (28.57–63.05)    
 Port Loko 249 9.16 (4.32–13.99) 0.0 (0.0–0.0) 6.75 (1.63–11.87)    
 Pujehun 252 23.05 (10.02–36.08) 0.19 (0–0.57) 27.43 (17.54–37.31)    
 Tonkolili 301 1.59 (0.35–2.84) 2.15 (0–5.93) 152.45 (99.99–204.91) NS 0.038 0.000
 WA-R 201 0.36 (0–1.06) 0.12 (0–0.36) 25.31 (12.58–38.05)    
 WA-U 197 111.84 (0–327.57) 0.24 (0–0.72) 14.01 (0–31.05)    
By sex
 Male 1844 6.33 (2.45–10.20) 6.15 (0–16.30) 62.38 (48.55–76.22)    
 Female 1788 22.74 (0–49.27) 0.54 (0–1.19) 28.12 (14.99–41.25)    
Seven districts only
Overall 1980 9.4 (0.0–20.7) 5.7 (0.0–15.2) 60.7 (43.8–77.6) NS 0.001 0.000
 Male 1009 5.8 (0.0–12.3) 10.4 (0.0–29.0) 85.9 (61.5–110.3) a NS NS 0.000
 Female 971 13.1 (0.0–35.1) 0.8 (0.0–2.0) 34.6 (11.3–57.9) a NS 0.041 NS
  1. a Significantly higher arithmetic mean epg in males versus females for hookworm in 2009 and 2016 (P < 0.001 for both)
  2. b Data for arithmetic mean EPG in 2009 are available in Hodges et al. [35], and not shown here
  3. WA-U Western Area Urban WA-R Western Area Rural, NS Not significant