Oral water soluble contrast for the management of adhesive small bowel obstruction

Saleh M Abbas; Ian P Bissett; Bryan R Parry

doi:10.1002/14651858.CD004651.pub2

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Figure 1

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Analysis 1.1

Comparison 1 Resolution or Laparotomy, Outcome 1 Comparison of numbers of patients who had resolution of bowel obstruction without operation in both groups.

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Analysis 2.1

Comparison 2 Hospital stay in days, Outcome 1 Length of hospital stay (in days) in both treatment and control group for non‐operated patients.

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Analysis 3.1

Comparison 3 Strangulation, Outcome 1 Number of patients who had strangulation of small bowel in both groups.

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Analysis 4.1

Comparison 4 Complications, Outcome 1 Number of patients who had complications in both treatment and control groups..

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Analysis 5.1

Comparison 5 Mortality, Outcome 1 Number of patients who died in each group.

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Table 1. Prediction of resolution

Study	True positive	False positive	False negative	True negative	Sensitivity	Specificity	Timing	LR+	LR_
Chung 1996	31	1	2	11	93	91	4	11.273	0.066
Chen 1999	74	0	8	34	90	100	8	62.831	0.104
Joyce 1992	112	0	2	13	98	100	4	27.391	0.023
Biondo 2003	39	0	0	5	100	100	24	11.850	0.014
Onoue 2002	90	2	1	4	97	60	24	2.446	0.036
Brochwicz‐Lewinski	16	0	0	8	97	94	4	17.471	0.031
Pooled	362	3	13	75	96	96		25	0.03

Table 1. Prediction of resolution

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Comparison 1. Resolution or Laparotomy

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Comparison of numbers of patients who had resolution of bowel obstruction without operation in both groups Show forest plot	4	345	Odds Ratio (M‐H, Fixed, 95% CI)	1.29 [0.75, 2.22]

Comparison 1. Resolution or Laparotomy

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Comparison 2. Hospital stay in days

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Length of hospital stay (in days) in both treatment and control group for non‐operated patients Show forest plot	2	168	Mean Difference (IV, Random, 95% CI)	‐2.58 [‐3.36, ‐1.80]

Comparison 2. Hospital stay in days

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Comparison 3. Strangulation

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Number of patients who had strangulation of small bowel in both groups Show forest plot	4	345	Risk Difference (M‐H, Random, 95% CI)	‐0.03 [‐0.06, 0.01]

Comparison 3. Strangulation

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Comparison 4. Complications

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Number of patients who had complications in both treatment and control groups. Show forest plot	3	255	Risk Difference (M‐H, Random, 95% CI)	0.02 [‐0.02, 0.06]

Comparison 4. Complications

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Comparison 5. Mortality

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Number of patients who died in each group Show forest plot	4	345	Risk Difference (M‐H, Random, 95% CI)	0.00 [‐0.02, 0.03]

Comparison 5. Mortality

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