Table 1 Description of participants in the Oslo Bariatric Surgery Study at each assessment time-point after surgery

Age

288

43.9

9.6

293

45.7

9.6

293

47.6

9.6

288

49.5

9.6

Gender

302

257

 Females

236

78.1%

199

77.4%

200

154

77.0%

302

236

78.1%

 Males

66

21.9%

58

22.6%

200

46

23.0%

302

66

21.9%

Surgery type

-

-

-

258

200

223

 Roux-en-Y gastric bypass

-

-

-

240

93.0%

184

92.0%

207

92.8%

 Sleeve gastrectomy

18

7.0%

16

8.0%

16

7.2%

Higher education

306

84

27.5%

241

73

30.3%

189

53

28.0%

204

64

31.4%

Being employed

306

193

69.4%

257

178

69.3%

198

130

65.7%

220

138

62.7%

Married/have a partner

306

202

66.2%

254

181

71.3%

199

142

71.4%

223

163

73.1%

Weight

278

130.5

22.5

271

90.0

19.1

205

92.2

19.2

223

95.7

20.0

BMI, kg/m²

274

43.3

5.8

252

30.9

5.7

190

31.7

5.8

206

32.9

5.7

 Under/normal weight

0

0%

252

29

11.5%

190

14

7.4%

204

11

5.4%

 Overweight

0

0%

252

99

39.3%

190

72

37.9%

204

48

23.5%

 Obese grade 1

10

3.6%

252

69

27.4%

190

57

30.0%

204

84

41.2%

 Obese grade 2

73

26.6%

252

37

14.7%

190

27

14.2%

204

40

19.6%

 Obese grade 3

191

69.7%

252

18

7.1%

190

20

10.6%

204

21

10.3%

Percent weight loss (%TWL)

-

-

-

218

29.1%

9.3–53.6%*

184

26.8

5.8–53.6%*

202

23.3

− 2.3–52.0%*

 > 20%

-

-

-

218

190

87.2%

184

141

76.6%

202

123

60.9%

Percent weight recurrence

-

-

-

-

-

-

190

14.7

0–70.8%*

196

25.6

0–117.3*

 > 20%

-

-

-

-

-

-

190

58

30.5%

196

103

52.6%

Action planning

-

-

-

255

2.9

0.7

197

2.9

0.6

79

2.8

0.7

Coping planning

-

-

-

255

2.6

0.7

197

2.6

0.7

79

2.4

0.7

Action control

-

-

-

256

2.9

0.6

197

2.8

0.6

81

2.9

0.5