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Table 2 Study description and results for cohort studies

From: Effect of non-surgical, non-pharmacological weight loss interventions in patients who are obese prior to hip and knee arthroplasty surgery: a rapid review

Study, design and quality

Demographics

Outcomes and results

Inacio et al. [26]

 

Total

THA

TKA

 

THA

TKA

 USA

No. of participants

9675

2554

7121

DSSI (adjusted OR and 95 % CI)

3.77 (1.59–8.95)

1.67 (0.77–3.61)

 Retrospective cohort

Lost ≥5 % of body weight (%)a

1381 (14.3)

444 (17.4)

937 (13.2)

SSSI (adjusted OR and 95 % CI)

0.95 (0.27–3.30)

1.41 (0.41–4.85)

 NOS quality score: 9

Gender (% female) who:

   

90-day Re-ad (adjusted OR and 95 % CI)

1.18 (0.72–1.93)

1.63 (1.16–2.28)

• Lost weight

67

65.1

68.2

• Stayed the same

59.7

52.6

62.1

Age (% <65 years)b

43.9

46.4

43.0

   

BMI (%)b

      

• ≥30 and <35 kg/m2

52.1

55.2

51.0

• ≥35 kg/m2

39.7

33.3

41.9

á…Ÿ

Inacio et al. [27]

 

Total

THA

TKA

 

THA

TKA

 USA

No. of participants

14,784

4066

10,718

DSSI (adjusted OR and 95 % CI)

1.83 (0.83–4.02)

1.27 (0.66–2.42)

 Retrospective cohort

Lost ≥5 % of body weight (%)a

2064 (14.0)

732 (18.0)

1332 (12.4)

SSSI (adjusted OR and 95 % CI)

1.16 (0.43–3.13)

0.83 (0.29–2.37)

 NOS quality score: 9

Gender (% female) who:

   

90-day Re-ad (adjusted OR and 95 % CI)

1.05 (0.70–1.57)

1.20 (0.88–1.63)

• Lost weight

64.9

61.2

67

• Stayed the same

60.7

61.2

63.4

• Gained weight

65.3

54.3

68.8

Age (% <65 years)b

46.6

50.8

33.0

   

BMI (%)b

      

• ≥30 and <35 kg/m2

50.8

53.5

49.7

• ≥35 kg/m2

41.0

35.3

43.2

  1. DSSI deep surgical site infection up to 1 year post-TJA, SSSI superficial surgical site infection within 30 days of TJA, Re-ad readmission, NOS Newcastle Ottawa Scale for cohort studies
  2. aNumber of patients who lost weight pre-operatively and kept it off post-operatively
  3. bPercentage based on total sample size