Table 2 Patient-reported outcome measures of included studies

Sebastia-Forcada [23], 2023

(2009–2012)

3~6 months, 1, 3, 5, 7, 10 years

KSFS, WOMAC (Function): maximum score was achieved at 3 years, remain steady to 5 years, decreased from 5 years to 7 years, and remained steady to 10 years

KSKS: maximum score was achieved at 3 years, remain steady to 5 years, decreased from 5 years to 7 years, and remained steady to 10 years

WOMAC (Pain): maximum score was achieved at 3 years, remain steady to 5 years, decreased from 5 years to 7 years, and remained steady to 10 years

NR

V. Wylde [28], 2021 (2006–2009)

3 months, 1, 2, 3, 5, 7, 10 years

WOMAC (Function): increased until 1 year, remained steady until 10 years

NR

WOMAC (Pain): increased until 1 year, remained steady until 10 years

Patients reporting large improvement in their QoL ranged from 60% to 77% over the duration of follow-up

UCLA: improved slightly at 3 months, and remained at this level for 10 years

Baek [26], 2021 (2009)

1, 3, 6, 10 years

KSFS: increased compared with pre-operative state, gradual subtle decline over time

KSKS: increased compared with pre-operative state, gradual subtle decline over time

NR

NR

Woo [20], 2021 (2006)

6 months, 2, 10 years

KSFS, OKS (Function): improved consistently until 2 years and decline from 2 to 10 years

KSKS: improve until 6 months and remain steady afterward

NR

PCS, MCS: improve until 6 months and remain steady afterward

Bajada [31], 2019 (2005–2007)

6 weeks, 6 months, 1, 2, 5, 10 years

NR

ROM: improved post-operatively and remained steady until 10 years

NR

NR

Scott [32], 2019 (2006–2007)

6 months,

1, 5, 10

years

NR

NR

NR

PCS: improved until 1 year and declined at 5 years

MCS: did not change significantly over the study periods

Arikupurathu [24], 2019 (1997–2002)

1, 3, 5, 7, 10 years

KSFS: improved until 1 year, significant reduction at each subsequent visit

NR

KSS (Pain): improved until 1 year, no further improvement afterward

NR

Jiang [21], 2017 (1999–2003)

1~10 years annually

OKS (Function): average annual decrease of 0.2 points

NR

OKS (Pain): average annual decrease of 0.2 points

NR

Williams [22], 2013 (1994–2008)

1~10 years annually

OKS (Function): maximum scores were achieved within the first 2 years and decline gradually over time

NR

OKS (Pain): improved until 4 years and decline gradually over time

NR

Arthur [20], 2013 (1998–1999)

5, 10 years

AKSS (Function): declined from 80.5 at the mid-term to 68.9 at the long-term

AKSS (Knee): declined from 84.3 at the mid-term to 78.8 at the long-term

AKSS (Pain): declined from 44.3 at the mid-term to 41.3 at the long-term

NR

Meding [27], 2012 (1975–1989)

6 months, 1, 3, 5, 7, 10, 12, 15, 17, 20 years

HSS, KSCR (Function, Stair, Walking): diminished over 20-year follow-up, but until 10 years, remained steady

HSS, KSCR (Knee): did not diminish over time

HSS, KSCR (Pain): did not diminish over time

Not reported as serial data

Watanabe [29], 2004 (1990–1993)

1, 3, 5, 10 years

KSFS: remained significantly higher for 10 years after surgery compared with their pre-operative values

KSKS: remained significantly higher for 10 years after surgery compared with their pre-operative values

NR

NR

Schrøder [25], 2001 (1984–1986)

3, 5~7, 10 years

Walking distance: similar result of 10 year compared with 5–7 years, but inferior than 3 years

NR

Pain during walking decreased during 10 years

NR