Table 3.
Comparison of demographics of robust versus nonrobust users.
| Variable | Total (baseline users; N=357) | Robust users (n=126) | Nonrobust users (n=231) | P valuea | |
| Observation duration (days), median (IQRb) | 382 (275-423) | 375 (256-422) | 382 (279-423) | .38 | |
| Retention duration (days), median (IQR) | 8 (1-63) | 124 (60-275) | 2 (1-7) | <.001 | |
| Sex, n (%) | .02 | ||||
|
|
Men | 277 (77.6) | 106 (84.1) | 171 (74.0) |
|
|
|
Women | 76 (21.3) | 18 (14.3) | 58 (25.1) |
|
| Smoking status, n (%) | .45 | ||||
|
|
Current smoker | 23 (6.4) | 9 (7.1) | 14 (6.1) |
|
|
|
Ex-smoker | 64 (17.9) | 35 (27.8) | 29 (12.6) |
|
|
|
Never smoked | 80 (22.4) | 42 (33.3) | 38 (16.5) |
|
| Age at diagnosis (years), n (%) | .11 | ||||
|
|
<40 | 33 (9.2) | 11 (8.7) | 22 (9.5) |
|
|
|
≥40 | 104 (29.1) | 53 (42.1) | 51 (22.1) |
|
| Hemoglobin A1c (%), median (IQR), (n=40) | 6.4 (5.9-7.2) | 6.3 (6.0-6.8)c | 6.7 (5.9-9.9)d | .34 | |
| Height (cm), median (IQR), (n=343) | 169 (164-174) | 170 (165-174) | 169 (163-174) | .46 | |
| Body weight (kg), median (IQR), (n=274) | 70.6 (62.0-81.5) | 70.8 (62.0-79.9) | 70.6 (62.0-82.5) | .59 | |
| Body mass index, median (IQR), (n=270) | 24.53 (21.99-27.82) | 24.49 (21.97-27.35) | 24.57 (22.03-28.34) | .64 | |
| Smoking status question, n (%) | <.001 | ||||
|
|
Answered | 167 (46.8) | 86 (68.3) | 81 (35.1) |
|
|
|
Unanswered | 190 (53.2) | 40 (31.7) | 150 (64.9) |
|
| Age at diagnosis question , n (%) | <.001 | ||||
|
|
Answered | 146 (40.9) | 72 (57.1) | 74 (32.0) |
|
|
|
Unanswered | 211 (59.1) | 54 (42.9) | 157 (68.0) |
|
aP value comparing robust users and nonrobust users using the Fisher exact test for categorical variables and Mann-Whitney U test for continuous variables.
bIQR: interquartile range.
cn=27.
dn=13.