Table 4.
Prevalence of cataract in the present study with comparison to literature
| Study group | Year | Study region | Cataract grading | Cut-off for cataract grading | n | Age (years) | Prevalence of cataract | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Any cataract | NC | CC | PSC | Mixed | |||||||
| Tanjong Pagar, Singapore | 2002 | Tanjong Pagar district | LOCS III | Nuclear cataract ≥4 Cortical cataract ≥2 Posterior subcapsular cataract ≥2 |
1206 | >40 | 34.7 | 22.6 | 23.9 | 7.0 | - |
| Sumatra Eye Study, Indonesia | 2005 | Rural Sumatra | LOCS III | Nuclear cataract ≥4 Cortical cataract ≥4 Posterior subcapsular cataract ≥2 |
919 | >21 | 23.0 | 35.7 | 30.1 | 15.1 | - |
| Su-Ying Tsai et al. Taiwan | 2003 | Shihpai, Taipei, Taiwan | LOCS III | Nuclear cataract ≥2 Cortical cataract ≥2 Posterior subcapsular cataract ≥2 |
1361 | >65 | 59.2 | 38.9 | 21.9 | 9.2 | - |
| Aravind Comprehensive Eye Study | 2003 | Rural area | LOCS III | Nuclear cataract ≥3 Cortical cataract ≥3 Posterior subcapsular cataract ≥2 |
5150 | >40 | 47.5 | 43.5 | 13.9 | 19.9 | 47.7 |
| Meiktila Eye Study | 2008 | Rural Area | LOCS III | Nuclear cataract ≥4 Cortical cataract ≥2 Posterior subcapsular cataract ≥2 |
2044 | >40 | 40.39 | 27.35 | 20.91 | 11.34 | - |
| INDEYE Study | 2011 | Both rural and urban | LOCS III | Nuclear cataract ≥4 Cortical cataract ≥3 Posterior subcapsular cataract ≥2 |
4946 | >60 | NI 58 | NI 48 | NI 7.6 | NI 21 | - |
| SI 53 | SI 38 | SI 10.2 | SI 17 | ||||||||
| Present study | Both rural and urban | LOCS III | Nuclear cataract ≥4 Cortical cataract ≥2 Posterior subcapsular cataract ≥2 |
Rural: 2651 | >60 | 44.68 | 10.88 | 4.74 | 7.75 | 12.7 | |
| Urban: 1680 | >60 | 43.62 | 9.18 | 11.36 | 3.52 | 18.6 | |||||
LOCS=Lens Opacities Classification System, NI=North India, SI=South India