Table 1.
Differences in age and symptom questionnaires among dry eye subtypes.
| Type 1 (1494) | Type 2 (698) | Type 3 (1160) | Type 4 (1465) | Total (4817) | p | |
|---|---|---|---|---|---|---|
| Age (years) | 55.5 ± 15.1 #,§,+ | 51.4 ± 15.8 *,+ | 52.3 ± 14.4 *,+ | 57.7 ± 14.2 *,#,§ | 54.8 ± 15.0 | <0.001 |
| SPEED | 11.1 ± 5.4 § | 11.5 ± 5.6 | 11.8 ± 5.6 * | 11.4 ± 5.6 | 11.4 ± 5.5 | 0.008 |
| Frequency (SPEED) | 5.2 ± 2.5 § | 5.3 ± 2.5 | 5.5 ± 2.6 * | 5.3 ± 2.6 | 5.3 ± 2.5 | 0.029 |
| Severity (SPEED) | 5.9 ± 3.2 #,§,+ | 6.2 ± 3.3 * | 6.3 ± 3.2 * | 6.1 ± 3.4 * | 6.1 ± 3.3 | 0.008 |
| OSDI | 37.3 ± 21.7 §,+ | 37.0 ± 21.9 § | 39.8 ± 23.1 *,# | 39.2 ± 22.5 * | 38.4 ± 22.4 | 0.007 |
| OSDI (Frequency) | 7.7 ± 4.5 | 7.4 ± 4.4 §,+ | 7.9 ± 4.5 # | 8.0 ± 4.6 # | 7.8 ± 4.5 | 0.029 |
| OSDI (Activity limitation) | 4.5 ± 3.7 § | 4.7 ± 3.8 | 5.0 ± 3.9 *,+ | 4.6 ± 3.8 § | 4.7 ± 3.8 | 0.014 |
| OSDI (Environment) | 3.8 ± 3.4 § | 3.8 ± 3.5 § | 4.2 ± 3.7 *,# | 4.0 ± 3.6 | 3.9 ± 3.5 | 0.004 |
Numbers in parenthesis represent case number in the indicated type. *: p < 0.05 as compared with type 1; #: p < 0.05 as compared with type 2; §: p < 0.05 as compared with type 3; +: p < 0.05 as compared with type 4.