Table 1 Baseline demographic characteristics for recipients of the mHealth program (intervention group) and usual care (historical control group) (N = 176)

Sex, female

31 (66.0%)

73 (56.6%)

Age (years)^a

54.5 ± 9.6

56.1 ± 8.1

Type of surgery

 Roux-en-Y gastric bypass

42 (89.4%)

104 (80.6%)

 Laparoscopic sleeve gastrectomy

4 (8.5%)

24 (18.6%)

 Mini bypass

1 (2.1%)

0 (0.0%)

 Single loop

0 (0.0%)

1 (0.8%)

Preoperative anthropometry

 Height (m)^a

1.7 ± 0.1

1.7 ± 0.1

 Weight (kg)^a

118.9 ± 16.4

118.1 ± 17.2

 Body mass index (kg/m²)^a

42.0 ± 6.0

42.0 ± 6.5

 Excess weight (kg)^a

55.5 ± 12.7

58.5 ± 18.4

Employment status

 Full time

20 (42.6%)

38 (29.5%)

 Part time

10 (21.3%)

15 (11.6%)

 Home duties/retired

17 (36.2%)

48 (37.2%)

 Unemployed

0 (0.0%)

28 (21.7%)

Aboriginal and Torres Strait Islander

 Does not identify

31 (66.0%)

103 (79.8%)

 Aboriginal

8 (17.0%)

18 (14.0%)

 Torres Strait Islander

2 (4.3%)

2 (1.6%)

 Aboriginal and Torres Strait Islander

3 (6.4%)

2 (1.6%)

 Did not wish to disclose

3 (6.4%)

4 (3.1%)

Length of hospital stay (days)^b

2 (1–7)

2 (1–18)