Table 1 Associations between early collected study variables and study visit compliance in the subsequent 3 years
Variable | n (%) or mean (SD) | Mean (SD) of number of completed visits or correlation (r) with number of completed visits. From 18–48 months of age | p value^ |
|---|---|---|---|
Sociodemographic | |||
Country | < 0.001 | ||
US | 1754 (38.1) | 10.11 (1.42) | |
Finland | 1058 (23.0) | 9.92 (1.57) | |
Germany | 204 (4.4) | 8.30 (2.26) | |
Sweden | 1584 (34.4) | 10.49 (1.03) | |
Child sex | 0.814 | ||
Female | 2247 (48.8) | 10.11 (1.42) | |
Male | 2353 (51.2) | 10.12 (1.78) | |
First degree relative with type 1 diabetes | < 0.001 | ||
No | 4196 (91.2) | 10.15 (1.42) | |
Yes | 404 (8.8) | 9.75 (1.78) | |
Child ethnic minority | 0.001 | ||
No | 3890 (84.6) | 10.16 (1.42) | |
Yes | 590 (12.8) | 9.93 (1.56) | |
Missing | 120 (2.6) | ||
First child | 0.003 | ||
No | 2639 (57.4) | 10.08 (1.47) | |
Yes | 1917 (41.7) | 10.21 (1.39) | |
Missing | 44 (1.0) | ||
Parents living together | 0.687 | ||
No | 132 (2.9) | 9.93 (1.55) | |
Yes | 4427 (96.2) | 10.14 (1.43) | |
Missing | 41 (0.9) | ||
Mothers education | < 0.001 | ||
Higher education | 2700 (58.7) | 10.22 (1.38) | |
Trade school | 1040 (22.6) | 9.90 (1.58) | |
Basic primary education | 831 (18.1) | 10.12 (1.44) | |
Missing | 29 (0.6) | ||
Mothers age at child’s birth | 4600 31.1 (4.9) | r = 0.06 | 0.005 |
Maternal lifestyle variables# | |||
Smokes | < 0.001 | ||
No | 4221 (91.8) | 10.16 (1.42) | |
Yes | 344 (7.5) | 9.72 (1.63) | |
Missing | 35 (0.8) | ||
Works outside home | 0.227 | ||
No | 2921 (63.5) | 10.11 (1.46) | |
Yes | 1622 (35.3) | 10.17 (1.38) | |
Missing | 57 (1.2) | ||
Maternal postpartum depression* | 0.081 | ||
No | 4092 (89.0) | 10.17 (1.41) | |
Yes | 357 (7.8) | 9.92 (1.61) | |
Missing | 151 (3.3) | ||
Maternal reactions to child’s type 1 diabetes risk | |||
Risk perception | 0.055 | ||
Underestimate | 1721 (37.4) | 10.19 (1.39) | |
Accurate | 2837 (61.7) | 10.10 (1.47) | |
Missing | 42 (0.9) | ||
Anxiety (SAI) | 4342 33.8 (9.4) | r = 0.06 | 0.050 |
Belief that child’s T1D risk can be reduced | 4558 4.8 (1.7) | r = 0.03 | 0.157 |
Study-related variables | |||
Mother’s study satisfaction score | 4556 4.7 (1.6) | r = 0.13 | < 0.001 |
Father’s study satisfaction score | 4363 4.2 (1.8) | r = 0.07 | 0.001 |
Father’s participation+ | < 0.001 | ||
No | 579 (12.6) | 9.42 (1.93) | |
Yes | 4021 (87.4) | 10.22 (1.35) | |