Table 1.
Baseline characteristics of study participants
| Characteristics | Participants without evidence of diabetic retinopathy at initial screening | P | |
|---|---|---|---|
| Did not attend a further screening event (n=6897)* | Attended at least one further screening event (n=49 763) | ||
| Age (years)† | 66.9 (13.5) | 64.4 (11.3) | <0.001 |
| Known duration of diabetes mellitus (years)† | 4.6 (4.8) | 4.2 (4.4) | <0.001 |
| Age at diagnosis of diabetes mellitus (years)† | 62.3 (13.2) | 60.2 (11.3) | <0.001 |
| Sex‡ | |||
| Male | 3794 (55.0) | 27 529 (55.3) | 0.087 |
| Female | 3175 (46.0) | 21 975 (44.2) | |
| Unknown | 18 (0.3) | 259 (0.5) | |
| Treatment for diabetes mellitus‡ | |||
| Diet | 2684 (38.9) | 17 236 (34.6) | <0.001 |
| Oral hypoglycaemic agents | 3787 (54.9) | 29 049 (58.4) | |
| Insulin | 394 (5.7) | 2669 (5.4) | |
| Unknown | 122 (1.8) | 809 (1.6) | |
*Group includes eligible participants only. †Mean (standard deviation). ‡Number (%).