Table 1 Demographics and baseline lifestyle descriptives for the full sample, users who have not connected a device and who have connected a device

Female (yes)

2233 (62.9%)

2010 (63.3%)

223 (59.0%)

χ²(1) = 2.835

0.092

Age (years)

44.50 ± 14.78

44.47 ± 14.93

44.71 ± 13.56

F(1) = 0.089

0.766

Employed (yes)

2496 (70.3%)

2221 (70.0%)

275 (72.8%)

χ²(1) = 2.314

0.128

Shift worker (yes)

243 (6.8%)

219 (6.9%)

24 (6.3%)

χ²(1) = 0.002

0.963

Self-rated overweight (yes)

1245 (35.1%)

1104 (34.8%)

141 (37.3%)

χ²(1) = 1.612

0.204

Alcohol use^a

χ²(4) = 5.001

0.287

 Never

616 (17.4%)

549 (17.3%)

67 (17.7%)

 Less than once a week

1085 (30.6%)

985 (31.1%)

100 (26.5%)

 Once a week

616 (17.4%)

553 (17.4%)

63 (16.7%)

 2–3 times a week

799 (22.5%)

705 (22.2%))

94 (24.9%)

 >4 times a week

434 (12.2%)

380 (12.0%)

54 (14.3%)

Caffeine use^a

χ²(4) = 5.345

0.254

 Never

379 (10.7%

343 (10.8%)

36 (9.5%)

 Less than once a day

585 (16.5%)

533 (16.8%)

52 (13.8%)

 Once a day

1056 (29.7%)

941 (29.7%)

115 (30.4%)

 2–3 times a day

1200 (33.8%)

1056 (33.3%)

144 (38.1%)

 >4 times a day

330 (9.3%)

299 (9.4%)

31 (8.2%)

Tobacco use^a

χ²(4) = 2.433

0.657

 Never smoked

3162 (89.1%)

2831 (89.2%)

331 (87.6%)

 Rarely

239 (6.7%)

213 (6.7%)

26 (6.9%)

 1–10 times a day

107 (3.0%)

92 (2.9%)

15 (4.0%)

 10–20 times a day

32 (0.9%)

28 (0.9%)

4 (1.1%)

 >21 times a day

10 (0.3%)

8 (0.3%)

2 (0.5%)

Exercising > 30 min^b

χ²(4) = 11.676

0.020

 Never

178 (5.2%)

166 (5.4%)

12 (3.3%)

 Less than once a week

452 (13.1%)

407 (13.2%)

45 (12.2%)

 Once a week

591 (17.1%)

530 (17.2%)

61 (16.6%)

 2–3 times a week

1227 (35.5%)

1110 (36.0%)

117 (31.8%)

 >4 times a week

1007 (29.1%)

874 (28.3%)

133 (36.1%)

Sleep medication (yes)

813 (22.9%)

712 (22.6%)

101 (27.5%)

χ²(1) = 4.472

0.034