Table 1.
Demographic and socioeconomic characteristics of study population. Medians are given with interquartile range
| Study factor | Controls (n=110) | Cases (n=110) |
|---|---|---|
| Age (years): | ||
| ⩽40 | 8 | 9 |
| 41-50 | 16 | 6 |
| 51-60 | 26 | 7 |
| 61-70 | 27 | 27 |
| 71-80 | 29 | 47 |
| 81-90 | 4 | 14 |
| Median | 63 (52-71) | 72 (63-88) |
| Sex: | ||
| Male | 54 | 60 |
| Female | 56 | 50 |
| Ethnicity: | ||
| White | 98 | 73 |
| African-Caribbean | 6 | 29 |
| Asian | 6 | 8 |
| Median intraocular pressure (mm Hg): | ||
| Right eye | 22.5 (20-26) | 27 (22-35) |
| Left eye | 23 (20-26) | 28 (23-34) |
| Maximum | 25 (22-27) | 30 ( 25-38) |
| Family history of glaucoma: | ||
| No | 58 | 89 |
| Yes | 48 | 17 |
| Referral source: | ||
| Optometrists with correct diagnosis | 100 | 63 |
| Other | 10 | 47 |
| Last visit to optometrist (years ago): | ||
| 1 | 27 | 12 |
| 2 | 45 | 23 |
| 3 | 16 | 10 |
| 5 | 12 | 15 |
| 6 | 0 | 1 |
| 10 | 5 | 23 |
| >10 or never | 5 | 26 |
| Median UPA score | 21.3 (6.1-37.4) | 29.5 (9.0-42.2) |
| Access to car: | ||
| Yes | 73 | 48 |
| No | 37 | 62 |
| Occupational group: | ||
| I | 5 | 0 |
| II | 27 | 1 |
| III | 56 | 42 |
| IV | 12 | 29 |
| V | 10 | 38 |
| Age at leaving full time education: | ||
| <14 | 4 | 18 |
| 14-15 | 63 | 74 |
| 16-17 | 23 | 14 |
| ⩾18 | 20 | 4 |
| Housing tenure: | ||
| Owner | 70 | 41 |
| Private rental | 8 | 10 |
| Local authority rental | 32 | 59 |
UPA=underprivileged area score.