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Table 2 Characteristics of 30-day mortality, in-hospital complications, rate of routine discharge and readmission for complications, and length of hospital stay

From: Effect of socioeconomic inequalities on cholecystectomy outcomes: a 10-year population-based analysis

Variables

All No. (%)

Low-income population No. (%), mean ± SE

General population No. (%), mean ± SE

p-valuec

30-day mortality

4987 (2.21%)

114 (4.65%)

4873 (2.18%)

< 0.001

 In-hospital mortality

3602 (1.60%)

81 (3.30%)

3521 (1.58%)

< 0.001

In-hospital complicationsa

9089 (4.03%)

138 (5.62%)

8951 (4.01%)

0.008

 Specific complications of the gallbladder/digestive system

4674 (2.07%)

62 (2.53%)

4612 (2.07%)

0.112

 Infections

2850 (1.26%)

53 (2.16%)

2797 (1.25%)

< 0.001

 Mechanical wound complications

1320 (0.59%)

20 (0.81%)

1300 (0.58%)

0.133

 Complications during procedure

882 (0.39%)

15 (0.61%)

867 (0.39%)

0.079

 Pulmonary complications

310 (0.14%)

5 (0.20%)

305 (0.14%)

0.373

 Systemic complications

156 (0.07%)

3 (0.12%)

153 (0.07%)

0.314

 Respiratory complications

74 (0.03%)

1 (0.04%)

73 (0.03%)

0.827

 Urinary complications

22 (0.01%)

1 (0.04%)

21 (0.01%)

0.118

 Other

40 (0.02%)

1 (0.04%)

39 (0.02%)

0.389

Rate of routine discharge

220,244 (97.64%)

2329 (94.91%)

217,915 (97.67%)

< 0.001

 Treatment and discharge

12,469 (5.53%)

94 (3.83%)

12,375 (5.55%)

< 0.001

 Transferred to outpatient treatment

207,775 (92.12%)

2235 (91.08%)

205,540(92.13%)

0.055

Readmission for complicationsb

2475 (1.10%)

45 (1.83%)

2430 (1.09%)

< 0.001

Length of hospital stay

12.13 ± 0.03

9.49 ± 0.02

< 0.001

Hospital costs

3263.82 ± 65.89

2832.17 ± 6.00

< 0.001

  1. aTwo or more complications occurred for the same patient; therefore, the total number of patients with complications was less than the sum of the number of patients with each independent complication
  2. bReadmission for complications was defined as readmission with the diagnosis of a commonly encountered postoperative complication within 1 month after the cholecystectomy
  3. cp-values for length of hospital stay and hospital costs were analyzed with independent t-tests; other variables were analyzed with Chi-square tests