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Table 1 Study population characteristics at baseline and follow-up at one year

From: The impact of a single round of community mass treatment with azithromycin on disease severity and ocular Chlamydia trachomatis load in treatment-naïve trachoma-endemic island communities in West Africa

 

Baseline

n b

Follow-up

n b

Median age (years) (IQRa)

13 (5–32)

1507

12 (5–35)

1033

Female

58%

869

63%

648

Age group

 0–5 years

28%

416

28%

288

 6–10 years

16%

250

17%

180

 11–15 years

11%

157

10%

113

  > 15 years

45%

684

45%

452

Conjunctival scarring (TSc)

Prevalence overall (95% CI)

23.8 (21.6–25.9)

357/1502

30.5 (27.7–33.3)

313/1026

Prevalence by age group (95% CI)

 0–5 years

2.7 (1.1–4.2)

11/414

2.1 (0.4–3.7)

6/288

 6–10 years

2.8 (0.8–4.8)

7/250

5.6 (2.2–9.1)

10/177

 11–15 years

11.5 (6.5–16.4)

18/157

18.9 (11.6–26.2)

21/111

  > 15 years

47.2 (43.5–51.0)

321/680

61.3 (56.8–65.8)

276/450

Trachomatous trichiasis (TT>15 d) (95% CI)

3.5 (2.1–4.9)

24/680

5.1 (3.1–7.1)

23/450

  1. aIQR, interquartile range
  2. bDenominator where indicated
  3. cWHO Simplified Trachoma Grading System (28); TT>15 reflects TT in those over the age of 15 years
  4. dCI, confidence interval