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. 2020 Mar 24;13(2):166–178. doi: 10.1159/000505837

Table 3.

Number of correctly answered questions

Questions Total (n = 219) Preoperative (n = 109) Postoperative (n = 110) Statistical analysis, χ2
1 Lifelong necessity to follow dietary recommendations 87.7% (192) 92.7% (101) 82.7% (91) χ2 = 5.363
df = 2
p = 0.068

2 Complication caused by smoking 83.1% (182) 86.2% (94) 80.0% (88) χ2 = 2.527
df = 2
p = 0.283

3 Dietary change after surgery 93.6% (205) 97.2% (106) 90.0% (99) χ2 = 5.235
df = 2
p = 0.073

4 Medication to prevent gastric ulcer 76.3% (167) 67.9% (74) 84.5% (93) χ2 = 8.389
df = 2
p = 0.015

5 Need of long-term follow-up 96.8% (212) 99.1% (108) 94.5% (104) χ2 = 3.738
df = 2
p = 0.154

6 Dealing with complaints after surgery 84.0% (184) 83.5% (91) 84.5% (93) χ2 = 1.135
df = 2
p = 0.567

7 Effect of physical activity after surgery 95.0% (208) 94.5% (103) 95.5% (105) χ2 = 0.106
df = 1
p = 0.745

8 Reasons for dumping syndrome 77.6% (170) 83.5% (91) 71.8% (79) χ2 = 7.429
df = 2
p = 0.024

9 Typical complaints of dumping syndrome1 32.0% (70) 29.4% (32) 34.5% (39) χ2 = 0.844
df = 2
p = 0.656

10 Side effects of gastric bypass1 37.9% (83) 34.9% (38) 40.9% (45) χ2 = 4.036
df = 2
p = 0.133

11 Need for supplementation of vitamins and minerals 98.6% (216) 99.1% (108) 98.2% (108) χ2 = 0.329
df = 1
p = 0.566

12 Recommended vitamins after surgery 89.5% (196) 87.2% (95) 91.8% (101) χ2 = 1.653
df = 2
p = 0.438

13 Vitamin that needs to be injected 93.2% (204) 88.1% (96) 98.2% (108) χ2 = 8.773
df = 2
p = 0.012

14 Recommended minerals after surgery 69.4% (152) 54.1% (59) 84.5% (93) χ2 = 26.550
df = 2
p > 0.001

15 Eating and drinking immediately after surgery 95.0% (208) 96.3% (105) 93.6% (103) χ2 = 0.833
df = 1
p = 0.361

16 Drinking after surgery 79.5% (174) 82.6% (90) 76.4% (84) χ2 = 1.291
df = 1
p = 0.256

17 Beverages recommended after surgery 78.5% (172) 8.4% (92) 72.7% (80) χ2 = 6.094
df = 2
p = 0.048

18 Meals recommended after surgery 78.5% (172) 87.2% (95) 70.0% (77) χ2 = 9.923
df = 2
p = 0.007

19 Daily protein requirement after surgery 70.8% (155) 73.4% (80) 68.2% (75) χ2 = 1.770
df = 2
p = 0.413

20 Food recommended to meet protein demand 95.9% (210) 96.3% (105) 95.5% (105) χ2 = 0.995
df = 2
p = 0.608

21 Carbohydrate intake after surgery1 60.7% (133) 64.2% (70) 57.3% (63) χ2 = 1.256
df = 2
p = 0.534

22 Alcohol consumption after surgery1 36.5% (80) 36.7% (40) 36.4% (40) χ2 = 0.724
df = 2
p = 0.696

23 Food not recommended after surgery 98.2% (215) 99.1% (108) 97.3% (107) χ2 = 1.333
df = 2
p = 0.513

24 Eating behavior after surgery 89.5% (196) 92.7% (101) 86.4% (95) χ2 = 2.758
df = 2
p = 0.252

25 What is removed by gastric bypass 69.9% (153) 75.2% (82) 64.5% (71) χ2 = 6.215
df = 2
p = 0.045

26 Questions about laparoscopy 83.1% (182) 83.5% (91) 82.7% (91) χ2 = 2.521
df = 2
p = 0.283

27 What happens to the stomach by gastric bypass 57.5% (126) 63.3% (69) 51.8% (57) χ2 = 4.451
df = 3
p = 0.217

28 Number of anastomoses in gastric bypass surgery1 41.6% (91) 46.8% (51) 36.4% (40) χ2 = 2.468
df = 2
p = 0.291

29 Number of anastomoses in sleeve gastrectomy1 51.1% (112) 59.6% (65) 42.7% (47) χ2 = 6.262
df = 2
p = 0.044

30 Ability to undo the surgery 68.0% (149) 77.1% (84) 59.1% (65) χ2 = 25.485
df = 3
p > 0.001

31 Improvement of comorbidities1 50.7% (111) 48.6% (53) 52.7% (58) χ2 = 0.384
df = 2
p = 0.825

32 Expected weight loss with gastric bypass 70.3% (154) 78.9% (86) 61.8% (68) χ2 = 15.163
df = 2
p = 0.001

Values are presented as % (n).

1

≤50% of participants answered this question correctly.