Table 1 Demographic and social cognitive characteristics of study participants who provided both Stage 1 and Stage 2 baseline data, by allocated study arm
|  | Intervention (n = 67) | Control (n = 62) |
|---|---|---|
Baseline demographic and clinical characteristics | ||
 Age, years | 35.0 (31.0–37.0) | 36.0 (33.8–37.3) |
 Gender: women | 40 (60%) | 37 (60%) |
 Country of birth: Australia | 41 (61%) | 43 (69%) |
 Main language spoken at home: English | 57 (85%) | 51 (82%) |
 Marital status: in a relationship | 44 (66%) | 39 (63%) |
Education level: | ||
 Secondary | 13 (20%) | 15 (24%) |
 Trade or certificate | 25 (37%) | 24 (39%) |
 Tertiary | 29 (43%) | 23 (37%) |
Employment status: in paid employment | 37 (55%) | 40 (65%) |
Socioeconomic status (SEIFA)# | 981.7 (73.8) | 998.4 (68.3) |
Diabetes duration, years | 1.53 (2.11) | 1.48 (1.78) |
Primary diabetes management: | ||
 Lifestyle only | 10 (15%) | 16 (26%) |
 Oral medication | 44 (66%) | 43 (69%) |
 Insulin | 13 (19%) | 3 (5%) |
 Family history of T2D: yes | 47 (70%) | 47 (76%) |
 Total diabetes-related health checks (range 0–6) | 4.67 (1.31) | 4.60 (1.50) |
 Health comorbidities, number | 1.79 (1.33) | 1.75 (1.45) |
 Depressive symptoms (PHQ-2, range 0–6) | 2.67 (2.15) | 2.15 (1.98) |
PRIMARY OUTCOME (engaged with retinal screening since diabetes diagnosis) | ||
 Yes (‘engaged’) | 48 (72%) | 44 (71%) |
 No (‘unengaged’) | 19 (28%) | 18 (29%) |
SECONDARY OUTCOME VARIABLES (social cognitive determinants) | ||
Knowledge | ||
 Knowledge of diabetes/vision link (range 0–2) | 1.97 (0.18) | 1.94 (0.23) |
 Knowledge of diabetic retinopathy (range 0–11) | 6.28 (2.20) | 6.66 (2.03) |
 Knowledge of retinal screening (range 0–3) | 1.46 (0.56) | 1.48 (0.70) |
Attitudes | ||
 Retinal screening (range 11–55) | 46.19 (5.62) | 46.12 (7.31) |
 Risk perception (range 4–28) | 13.23 (4.46) | 12.26 (4.27) |
 Anticipated regret (range 6–42) | 24.73 (6.19) | 24.53 (6.65) |
 Normative beliefs (range 2–14) | 13.41 (1.96) | 13.09 (2.29) |
 Intention (range 3–21) | 18.31 (4.78) | 18.60 (5.29) |
Behavioural skills | ||
 Perceived behavioural control (range 6–30) | 23.58 (5.11) | 24.20 (5.27) |
 Overcoming barriers (range 5–55) | 19.41 (4.25) | 19.75 (4.61) |