Table 1.
Characteristics of participants and controls of the analysis samples using claims data at the time of KTx.
| a) Incident participants and controls | |||
|---|---|---|---|
| Controls (N = 182) | Participants (N = 258) | p-value | |
| Age, years | 0.726 | ||
| Median (Q1, Q3) | 51 (42, 63) | 52.5 (43, 61.8) | |
| Sex, n (%) | 0.234 | ||
| Male | 114 (62.6%) | 147 (57.0%) | |
| Female | 68 (37.4%) | 111 (43.0%) | |
| Donation type, n (%) | 0.057 | ||
| Living | 24 (13.2%) | 52 (20.2%) | |
| Deceased | 158 (86.8%) | 206 (79.8%) | |
| Previous KTx, n (%) | 0.934 | ||
| Yes | 20 (11.0%) | 29 (11.2%) | |
| Diabetes mellitus, n (%) | 0.009 | ||
| Yes | 49 (26.9%) | 43 (16.7%) | |
| Hypertension, n (%) | 0.013 | ||
| Yes | 103 (56.6%) | 176 (68.2%) | |
| CVD, n (%) | 0.384 | ||
| Yes | 40 (22.0%) | 48 (18.6%) | |
| Mental comorbidity, n (%) | 0.510 | ||
| Yes | 25 (13.7%) | 30 (11.6%) | |
| Duration of observation period, years | 0.004 | ||
| Median (Q1, Q3) | 1.0 (0.6, 2.0) | 1.6 (0.8, 2.0) | |
| b) Prevalent participants and controls | |||
|---|---|---|---|
| Controls (N = 236) | Participants (N = 153) | p-value | |
| Age, years | 0.083 | ||
| Median (Q1, Q3) | 53 (41, 62) | 50 (39, 60) | |
| Sex, n (%) | 0.946 | ||
| Male | 138 (58.5%) | 90 (58.8%) | |
| Female | 98 (41.5%) | 63 (41.2%) | |
| Donation type, n (%) | 0.022 | ||
| Living | 47 (19.9%) | 46 (30.1%) | |
| Deceased | 189 (80.1%) | 107 (69.9%) | |
| Previous KTx, n (%) | 0.106 | ||
| Yes | 24 (10.2%) | 24 (15.7%) | |
| Diabetes mellitus, n (%) | 0.340 | ||
| Yes | 51 (21.6%) | 27 (17.6%) | |
| Hypertension, n (%) | 0.861 | ||
| Yes | 146 (61.9%) | 96 (62.7%) | |
| CVD, n (%) | 0.174 | ||
| Yes | 36 (15.3%) | 16 (10.5%) | |
| Mental comorbidity, n (%) | 0.153 | ||
| Yes | 33 (14.0%) | 14 (9.2%) | |
| Start of observation period after KTx, years | 0.008 | ||
| Median (Q1, Q3) | 3.4 (2.4, 4.4) | 2.9 (2.0, 3.9) | |
| Study participation start after KTx, years | – | ||
| Median (Q1, Q3) | – | 2.3 (1.3, 3.3) | |
| Duration of observation periods, years | 0.005a | ||
| Median (Q1, Q3) | 1.5 (1.5, 1.5) | 1.5 (1.5, 1.5) | |
Q1, Q3, quartile 1 and 3, KTx, kidney transplantation, CVD, cardiovascular disease.
a
There were more patients with shorter observation periods in the control group.