Table 2.
Sample characteristics at first registration
| All | Men | Women | |
|---|---|---|---|
| N | 9,466 (100%) | 2,784 (29%) | 6,682 (71%) |
| Age (years) | 55.6 (46.4–63.6) | 59.7 (50.3–66.8)* | 54.0 (44.5–61.9) |
| Body weight (kg) | 80.0 (69.0–95.0) | 92.0 (82.0–105.0)* | 75.0 (66.0–88.0) |
| Body height (cm) | 170.0 (165.0–178.0) | 180.0 (175.0–184.0)* | 168.0 (163.0–172.0) |
| BMI | 27.4 (24.1–31.6) | 28.4 (25.6–32.2)* | 26.7 (23.6–31.2) |
| Weight status (BMI [kg/m2]*) | |||
| Normal weight (BMI <25), N (%) | 3,028 (31.1) | 568 (20.4) | 2,475 (37.1) |
| Overweight (BMI ≥25 and <30), N (%) | 3,310 (34.9) | 1,144 (41.1) | 2,160 (32.3) |
| Obese (BMI ≥30), N (%) | 3,127 (33.0) | 1,072 (38.5) | 2,047 (30.6) |
| Mobile operating system* | |||
| iPhone operating system, N (%)a | 6,972 (73.5) | 1,913 (73.5) | 5,049 (80.2) |
| Android, N (%)a | 1,799 (19.0) | 692 (26.5) | 1,101 (19.8) |
Notes: Data are medians (interquartile range) or actual numbers (relative frequency).
a
Subsample of 8,771 users (only registered in Version 1.1).
*
P<0.001 for sex differences (Wilcoxon’s signed rank test or Fisher’s exact test).
Abbreviation: BMI, body mass index.