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Table 2 Univariate and multivariate odds ratios and 95% confidence intervals for ED visit and hospital admissions in the 3 days following ambulatory surgery: 2014–2018

From: Pain and haemorrhage are the most common reasons for emergency department use and hospital admission in adults following ambulatory surgery: results of a population-based cohort study

Character

Total

ED Visits

Hospital Admissions

Unadjusted

Adjusted

Unadjusted

Adjusted

OR (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

Number of patients

484,670

    

Sex

 Male

210,423

1.00

1.00

1.00

1.00

 Female

274,247

0.75 (0.72–0.77)

0.73 (0.71–0.76)

0.92 (0.89–0.95)

1.00 (0.97–1.04)

Material deprivation quintile

 1—lowest (reference)

104,530

1.00

1.00

1.00

1.00

 2

102,621

1.10 (1.05–1.17)

1.08 (1.03–1.14)

1.12 (1.06–1.18)

1.11 (1.05–1.18)

 3

95,956

1.16 (1.10–1.23)

1.13 (1.07–1.19)

1.20 (1.13–1.26)

1.18 (1.12–1.25)

 4

90,662

1.28 (1.21–1.35)

1.22 (1.15–1.29)

1.31 (1.24–1.39)

1.29 (1.22–1.36)

 5—highest

87,529

1.46 (1.39–1.54)

1.38 (1.31–1.46)

1.42 (1.34–1.50)

1.44 (1.36–1.52)

 Missing

3372

2.66 (2.31–3.07)

1.99 (1.72–2.30)

2.48 (2.13–2.88)

2.45 (2.10–2.85)

Residence*

 Urban (reference)

416,877

1.00

1.00

1.00

1.00

 Rural

67,237

1.49 (1.43–1.56)

1.28 (1.22–1.34)

1.40 (1.34–1.46)

1.25 (1.19–1.31)

# of Major ADG

 0 (reference)

207,310

1.00

1.00

1.00

1.00

 1

177,491

1.15 (1.11–1.20)

1.19 (1.14–1.23)

1.28 (1.23–1.33)

1.24 (1.19–1.30)

 2

99,869

1.67 (1.60–1.74)

1.78 (1.70–1.85)

2.53 (2.43–2.64)

2.28 (2.19–2.38)

Usual provider of care model

 No model (reference)

66,391

1.00

1.00

1.00

1.00

 Family Health Group

115,522

0.79 (0.75–0.83)

0.87 (0.82–0.92)

0.79 (0.75–0.83)

0.79 (0.75–0.84)

 Family Health Team

142,311

0.94 (0.89–0.99)

0.91 (0.87–0.96)

0.94 (0.89–0.99)

0.85 (0.81–0.90)

 Family Health Organization

141,696

0.78 (0.74–0.82)

0.82 (0.78–0.87)

0.81 (0.77–0.85)

0.76 (0.72–0.80)

 Comprehensive Care Model

14,184

0.79 (0.71–0.88)

0.84 (0.75–0.93)

0.98 (0.89–1.09)

0.94 (0.85–1.04)

 Other

4551

1.15 (0.99–1.34)

0.87 (0.74–1.02)

1.20 (1.03–1.40)

0.97 (0.83–1.14)

Type of surgery

 Cholecystectomy (reference)

82,891

1.00

1.00

1.00

1.00

 Implantation of internal devices, tympanic membrane

5156

0.37 (0.29–0.46)

0.36 (0.29–0.45)

0.08 (0.06–0.12)

0.08 (0.05–0.11)

 Knee joint repair

81,000

0.49 (0.46–0.52)

0.50 (0.47–0.53)

0.09 (0.08–0.10)

0.09 (0.08–0.10)

 Nerves in the forearm and wrist

40,340

0.64 (0.59–0.68)

0.60 (0.56–0.65)

0.09 (0.08–0.10)

0.07 (0.06–0.08)

 Shoulder surgery

41,537

0.83 (0.78–0.88)

0.83 (0.78–0.88)

0.42 (0.39–0.45)

0.39 (0.37–0.42)

 Muscle repair of the chest/abdomen: hernia

110,802

0.96 (0.92–1.00)

0.97 (0.93–1.02)

0.52 (0.50–0.54)

0.44 (0.42–0.46)

 Appendectomy

4444

0.96 (0.83–1.12)

0.94 (0.81–1.10)

3.89 (3.60–4.20)

4.64 (4.28–5.02)

 Tonsillectomy

16,427

2.02 (1.89–2.15)

1.95 (1.82–2.09)

0.52 (0.48–0.57)

0.91 (0.83–1.00)

  1. *Estimates based on Rurality Index of Ontario 2008
  2. Johns Hopkins Aggregated Diagnostic Groups
  3. Adjusted for age and Local Health Integration Network (results not shown)