Table 4 Attrition rate (%) by self-reported age and gender across completed surveys in each country, February to April 2023.

From: A study in Bangladesh, Colombia, and Uganda on creating and retaining mobile health survey panels for longitudinal data collection

Age (years)

Attrition, %

Wave 1 to 2

(w1 − w2)/w1

Wave 2 to 3

(w2 − w3)/w2

Wave 1 to 3

(w1 − w3)/w1

M

F

M

F

M

F

Bangladesh

 18–29

33.0

38.7

42.3

39.5

61.4

62.9

 30–44

39.1

38.1

43.2

46.2

65.4

66.7

 45+

54.6

66.7

55.7

50.0

79.9

83.3

 18+

36.3

39.8

43.2

41.1

63.8

64.5

 Total1

37.2

43.0

64.2

Colombia

 18–29

43.9

38.0

35.4

32.6

63.8

58.2

 30–44

48.6

38.3

36.1

31.0

67.2

57.4

 45+

51.8

47.6

39.9

33.3

71.0

65.1

 18+

47.3

40.1

36.5

32.2

66.5

59.4

 Total1

43.7

34.0

62.8

Uganda

 18–29

36.7

41.9

31.3

30.1

56.5

59.4

 30–44

39.5

30.8

27.3

36.0

56.0

55.7

 45+

41.4

49.0

43.1

32.7

66.7

65.6

 18+

38.1

39.7

28.4

31.9

57.3

58.9

 Total1

39.2

31.6

58.4

  1. 1Does not include people who answered “Other”. See supplemental table for additional data.
  2. M Male, F Female, W Wave.
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