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Table 1 Characteristics of included studies

From: The prevalence and prognostic value of frailty screening measures in patients undergoing surgery for colorectal cancer: observations from a systematic review

Study

Design

Patient (n =)

Country

Frailty screening tool

Prevalence of frailty (%)

Timing of assessment

Age (Median/ Mean; years)

% Male/Female

TNM Stage

Artiles-Armas et al. (2021,) [34]

Prospective

149

Spain

Clinical Frailty Scale

42 CSHA CFS ≥ 4)

Pre-operative

75

64/36

I-IV

Bessems et al. (2021,) [33]

Retrospective

132

Netherlands

Geriatric 8 questionnaire

40 G8 ≤ 14)

Pre-operative

78

58/42

I-IV

Chen et al. (2018,) [21]

Retrospective

1928

USA

Modified Frailty Index (MFI-5)

12 (MFI ≥ 2)

Pre-operative

59

55/45

IV

Feliciano et al. (2020,) [22]

Prospective

691

USA

Fried Frailty phenotype

18 (Fried ≥ 3/5 criteria)

Pre-operative

63

Female only

NR

Gearhart et al. (2020,) [25]

Retrospective

1676

USA

Modified Frailty Index (MFI-5)

25 (MFI ≥ 2)

Pre-operative

75

50/50

NR

Lo et al. (2020,) [23]

Retrospective

81, 803

USA

Modified Frailty Index (MFI-5)

20 (MFI ≥ 2)

Pre-operative

NR (59% ≥ 65)

50/50

I-IV

Miller et al. (2020,) [26]

Retrospective

9,252

USA

Modified Frailty Index (MFI-5)

15 (MFI ≥ 2)

Pre-operative

NR (25% ≥ 65)

58/42

I-IV

Mima et al. (2020, [35])

Retrospective

729

Japan

Clinical Frailty Scale

35 (CSHA CFS ≥ 4)

Pre-operative

NR (46% ≥ 75 years)

53/47

I-III

Okabe et al. (2019,) [27]

Prospective

269

Japan

Clinical Frailty Scale

29 (CSHA CFS ≥ 4)

Pre-operative

80

62/38

III-IV

Reisinger et al. (2015,) [28]

Retrospective

310

Netherlands

Groningen Frailty Indicator

25 (GFI ≥ 5)

Pre-operative

NR (51% ≥ 70)

50/50

II-IV

Richards et al. (2021,) [29]

Prospective

86

New Zealand

Edmonton Frailty Scale

14 (EFS ≥ 8)

Pre-operative

76

50/50

I-IV

Souwer et al. (2018,) [30]

Retrospective

139

Netherlands

Geriatric 8 questionnaire

50 (G8 ≤ 14)

Pre-operative

77.8

55/45

I-III

Suzuki et al. (2021,) [31]

Retrospective

151

Japan

Modified Frailty Index (MFI-11)

35 (MFI ≥ 3)

Pre-operative

84

44/56

NR

Tamura et al. (2021,) [24]

Prospective

500

Japan

Geriatric 8 questionnaire

56 (G8 ≤ 14)

Pre-operative

76

58/42

I-IV

Tan et al. (2012,) [32]

Prospective

83

Japan

Fried Frailty Phenotype

28 (Fried ≥ 3/5 criteria)

Pre-operative

81.2

NR

NR