Descriptive Statistics

Sociodemographics (Table 1)


Presence of Reflux
  No Yes Total P-value
(N=228) (N=256) (N=484)
sex
Male 52 (22.8%) 50 (19.5%) 102 (21.1%) 0.678
Female 176 (77.2%) 206 (80.5%) 382 (78.9%)
Age
Mean (SD) 45.4 (11.8) 48.0 (11.6) 46.8 (11.8) 0.0575
Median [Min, Max] 44.5 [19.0, 73.0] 48.0 [23.0, 75.0] 46.0 [19.0, 75.0]
Age Intervals
<20 3 (1.3%) 0 (0%) 3 (0.6%) 0.917
20-24 3 (1.3%) 2 (0.8%) 5 (1.0%)
25-29 11 (4.8%) 15 (5.9%) 26 (5.4%)
30-34 26 (11.4%) 17 (6.6%) 43 (8.9%)
35-39 38 (16.7%) 33 (12.9%) 71 (14.7%)
40-44 33 (14.5%) 27 (10.5%) 60 (12.4%)
45-49 32 (14.0%) 44 (17.2%) 76 (15.7%)
50-54 25 (11.0%) 37 (14.5%) 62 (12.8%)
55-59 28 (12.3%) 38 (14.8%) 66 (13.6%)
60-64 13 (5.7%) 20 (7.8%) 33 (6.8%)
65-69 11 (4.8%) 16 (6.3%) 27 (5.6%)
70-75 5 (2.2%) 7 (2.7%) 12 (2.5%)
Race
White 179 (78.5%) 213 (83.2%) 392 (81.0%) 0.812
Black, African-American 39 (17.1%) 37 (14.5%) 76 (15.7%)
American or Alaskan Native 7 (3.1%) 6 (2.3%) 13 (2.7%)
Native Hawaiian 2 (0.9%) 0 (0%) 2 (0.4%)
Asian 1 (0.4%) 0 (0%) 1 (0.2%)
Ethnic
Hispanic 72 (31.6%) 67 (26.2%) 139 (28.7%) 0.423
Non-Hispanic 156 (68.4%) 189 (73.8%) 345 (71.3%)
Insurance
No 12 (5.3%) 12 (4.7%) 24 (5.0%) 0.958
Yes 216 (94.7%) 244 (95.3%) 460 (95.0%)


Preoperative Variables of Interest


Presence of Reflux
  No Yes Total P-value
(N=228) (N=256) (N=484)
pH 24 Hr Monitoring
No 141 (61.8%) 153 (59.8%) 294 (60.7%) 0.897
Yes 87 (38.2%) 103 (40.2%) 190 (39.3%)
Demeester Score
Mean (SD) 5.18 (25.3) 5.83 (22.0) 5.52 (23.6) 0.955
Median [Min, Max] 0 [0, 237] 0 [0, 272] 0 [0, 272]
H.Pylori Positive or Not
No 193 (84.6%) 228 (89.1%) 421 (87.0%) 0.354
Yes 35 (15.4%) 28 (10.9%) 63 (13.0%)
Esophagitis
No 216 (94.7%) 238 (93.0%) 454 (93.8%) 0.723
Yes 12 (5.3%) 18 (7.0%) 30 (6.2%)
Barrett´s
No 228 (100%) 254 (99.2%) 482 (99.6%) 0.409
Yes 0 (0%) 2 (0.8%) 2 (0.4%)
Preoperative BMI
Mean (SD) 45.5 (7.26) 44.6 (7.31) 45.0 (7.30) 0.38
Median [Min, Max] 43.9 [33.7, 76.7] 43.1 [32.0, 68.6] 43.5 [32.0, 76.7]
Anti Reflux Meds Befor Qx
Famotidine 1 (0.4%) 5 (2.0%) 6 (1.2%) 0.001
MgOH 1 (0.4%) 0 (0%) 1 (0.2%)
Nil 216 (94.7%) 172 (67.2%) 388 (80.2%)
Pepcidine 1 (0.4%) 1 (0.4%) 2 (0.4%)
PPI 8 (3.5%) 68 (26.6%) 76 (15.7%)
Zantac 1 (0.4%) 4 (1.6%) 5 (1.0%)
PPI, MgOH 0 (0%) 3 (1.2%) 3 (0.6%)
Ranitidine 0 (0%) 2 (0.8%) 2 (0.4%)
Zantac, PPI 0 (0%) 1 (0.4%) 1 (0.2%)


Post Operative Variables of Interest


Presence of Reflux
  No Yes Total P-value
(N=228) (N=256) (N=484)
GERD at One Month
Resolved 0 (0%) 8 (3.1%) 8 (1.7%) 0.001
Improved 7 (3.1%) 51 (19.9%) 58 (12.0%)
Worse 1 (0.4%) 2 (0.8%) 3 (0.6%)
No change 33 (14.5%) 113 (44.1%) 146 (30.2%)
New diagnosis 4 (1.8%) 0 (0%) 4 (0.8%)
Not applicable 134 (58.8%) 22 (8.6%) 156 (32.2%)
Missing 49 (21.5%) 60 (23.4%) 109 (22.5%)
GERD at Third Month
Resolved 4 (1.8%) 8 (3.1%) 12 (2.5%) 0.001
Improved 8 (3.5%) 58 (22.7%) 66 (13.6%)
Worse 0 (0%) 3 (1.2%) 3 (0.6%)
No change 39 (17.1%) 89 (34.8%) 128 (26.4%)
New diagnosis 4 (1.8%) 0 (0%) 4 (0.8%)
Not applicable 110 (48.2%) 18 (7.0%) 128 (26.4%)
Missing 63 (27.6%) 80 (31.3%) 143 (29.5%)
GERD at Sixth Month
Resolved 6 (2.6%) 25 (9.8%) 31 (6.4%) 0.001
Improved 6 (2.6%) 34 (13.3%) 40 (8.3%)
Worse 0 (0%) 2 (0.8%) 2 (0.4%)
No change 26 (11.4%) 71 (27.7%) 97 (20.0%)
New diagnosis 1 (0.4%) 0 (0%) 1 (0.2%)
Not applicable 87 (38.2%) 18 (7.0%) 105 (21.7%)
Missing 102 (44.7%) 106 (41.4%) 208 (43.0%)
GERD at Year
Resolved 8 (3.5%) 22 (8.6%) 30 (6.2%) 0.001
Improved 6 (2.6%) 27 (10.5%) 33 (6.8%)
Worse 0 (0%) 5 (2.0%) 5 (1.0%)
No change 9 (3.9%) 53 (20.7%) 62 (12.8%)
New diagnosis 1 (0.4%) 0 (0%) 1 (0.2%)
Not applicable 62 (27.2%) 10 (3.9%) 72 (14.9%)
Missing 142 (62.3%) 139 (54.3%) 281 (58.1%)
Reflux at One Year
No 0 (0%) 0 (0%) 0 (0%) NA
Yes 50 (21.9%) 68 (26.6%) 118 (24.4%)
Missing 178 (78.1%) 188 (73.4%) 366 (75.6%)
Reflux at 2nd Year
No 0 (0%) 0 (0%) 0 (0%) NA
Yes 12 (5.3%) 27 (10.5%) 39 (8.1%)
Missing 216 (94.7%) 229 (89.5%) 445 (91.9%)
Reflux Meds at 3 Months Post-Qx
Lost to follow up 25 (11.0%) 30 (11.7%) 55 (11.4%) 0.979
MgOH 7 (3.1%) 3 (1.2%) 10 (2.1%)
Nil 18 (7.9%) 20 (7.8%) 38 (7.9%)
PPI 169 (74.1%) 193 (75.4%) 362 (74.8%)
PPI, MgOH 9 (3.9%) 8 (3.1%) 17 (3.5%)
PPH, MgOH 0 (0%) 1 (0.4%) 1 (0.2%)
PPI, Zantac 0 (0%) 1 (0.4%) 1 (0.2%)
Reflu Meds at 6 Months Post-Qx
Lost to follow up 76 (33.3%) 77 (30.1%) 153 (31.6%) 0.871
MgOH 3 (1.3%) 3 (1.2%) 6 (1.2%)
Nil 49 (21.5%) 45 (17.6%) 94 (19.4%)
PPI 98 (43.0%) 125 (48.8%) 223 (46.1%)
PPI, MgOH 2 (0.9%) 6 (2.3%) 8 (1.7%)
Reflux Meds at 12 Months Post-Qx
Lost to follow up 114 (50.0%) 107 (41.8%) 221 (45.7%) 0.785
MgOH 1 (0.4%) 5 (2.0%) 6 (1.2%)
Nil 66 (28.9%) 78 (30.5%) 144 (29.8%)
PPI 44 (19.3%) 62 (24.2%) 106 (21.9%)
PPI, MgOH 3 (1.3%) 3 (1.2%) 6 (1.2%)
Pepcidine 0 (0%) 1 (0.4%) 1 (0.2%)

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