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Table 9 Prevalence of Glaucoma in some population-based studies for age ≥40 years

From: A Population-based survey of the prevalence and types of glaucoma in Nigeria: results from the Nigeria National Blindness and Visual Impairment Survey

Study population

Examined (response rate %)

Prevalence of glaucoma

Undiagnosed glaucoma (%)

Proportion blind (%)

Reference

n

All glaucoma % (95 % CI)

40–49 years age-specific

Nigeria, National

13,951 (90)

682

5.0 (4.6–5.5)

1.9 (1.6–2.3)

94

20

This study

Africa

 Kongwa, Tanzania

3247 (89)

135

4.2 (3.5–4.9)

1.7 (1.1–2.5)

98

14

[18]

 Hlabisa, South Africa

1005 (90)

41

4.5 (3.2–6.1)

1.2 (0.2–3.4)

90

 

[19]

 Temba, South Africa

839 (75)

55

5.3 (3.9–7.1)

1.1b

87

 

[20]

 Tema, Ghana

5603 (82)

32

6.5 (5.8–7.1)

3.2 (2.7–4.1)

97

3

[21]

 Akinyele, Nigeria

811 (90)

59

7.3 (5.5–9.1)

4.6 (2.1–7.1)

90

6

[22]

Asia

 Qatar

3149 (97)

67

1.7 (1.7–1.8)

1.45 b

51

6

[48]

 Yazd, Iran

1990 (86)

87

4.4 (3.3–5.4)

1.6 (0.8–2.4)

90

 

[46]

 Chinese, Singapore

1232 (72)

45

3.2 (2.3–4.1)a

1.1 (0.2–4.8)

62

 

[31]

 Chinese, Singapore

3353 (73)

134

3.2 (2.7–3.9)a

0.7 b

85

10

[38]

 Malay, Singapore

3280 (79)

150

3.4 (3.3–3.5)a

2.2 b

92

10

[36]

 Indian, Singapore

3400 (76)

78

1.9 (1.5–2.5)a

1.3 b

72

10

[35]

 Beijing, China

4439 (83)

158

3.7 (3.1–4.2)

2.2 (1.5–3.0)

-

2

[37]

 Kailu, China

5197 (87)

169

2.9 (2.0–3.8)a

2.0 (1.3–2.7)

66

7

[32]

 Bhaktapur, Nepal

3991 (83)

75

1.8 (1.7–1.9)a

0.3 b

96

2

[33]

 Central India

4711 (80)

122

3.5 (2.8–4.1)

1.0 (0.5–1.6)

–

1

[34]

Australia

 Indigenous, Australia

1061 (64)

26

2.2 (1.6–3.6)

1.5 (0.4–2.5)

81

12

[47]

Europe

 Ponza, Italy

1034 (84)

39

3.8b

0 (0.0–1.7)

–

 

[42]

 Egna-Neumarkt, Italy

4297 (74)

121

2.9b approx

0.5 b

–

 

[41]

 Wroclaw, Poland

4853 (83)

79

1.6 (1.3–2.0)

0.4 (0.1–1.1)

71

 

[44]

  1. CI confidence interval
  2. aAdjusted rates
  3. b95 % confidence interval not reported
  4. – no data