Table 1 Comparison of TTBWA register in July 2013 and July 2016, revealing growth in registrations, driven by digitisation of the paper record and by new incident registrations.

From: Sight impairment registration in Trinidad: trend in causes and population coverage in comparison to the National Eye Survey of Trinidad and Tobago

Region

Total n

New registrations due to location of further paper-based records (with 3-year growth rate), n(%)

New registrations (with 3-year growth rate), n(%)

Percentage registered sight impaired compared to mid-year regional population size (all ages) n/N(%)

Northwest

2013 Register

206

  

206/297,604 (0.07)

2016 Register

281

68 (33.0)

7 (0.5)

281/300,565 (0.09)

Change n(%)

75 (36.4)

   

Central

2013 Register

175

  

175/246,662 (0.07)

2016 Register

222

36 (20.6)

11 (6.3)

222/249,116 (0.09)

Change n(%)

47 (26.9)

   

Eastern

2013 Register

50

  

50/111,266 (0.04)

2016 Register

61

8 (16.0)

3 (6.0)

61/112,373 (0.05)

Change n(%)

11 (22.0)

   

Southwest

2013 Register

285

  

285/624,700 (0.05)

2016 Register

289

2(0.7)

2 (0.7)

289/630,915 (0.05)

Change n(%)

4 (1.4)

   

Address not listed

2013 Register

10

   

2016 Register

10

0

0

 

Change n(%)

0

   

TOTAL

2013 Register

726

  

726/1,340,557 (0.05)

2016 Register

863

114 (15.7)

23 (3.2)

863/1,353,895 (0.06)

Change n(%)

137 (18.9)

   
  1. *Regional population proportions from latest (2011) Census: 22.2% Northwest, 18.4% North Central, 8.3% Eastern, 46.6% South West and 4.5% Tobago, applied to 2013 mid-year population (1,340,557) and 2016 mid-year population (1,353,895). Source: https://cso.gov.tt/subjects/population-and-vital-statistics/population/