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Table 5 Percentages of floor and ceiling effects in individual Chinese Cantonese (Hong Kong) translated FJS-12 questions collected at baseline and follow-up

From: Traditional Chinese-Hong Kong version of Forgotten Joint Score-12 (FJS-12) for patients with osteoarthritis of the knee underwent joint replacement surgery: cross-cultural and sub-cultural adaptation, and validation

Questions

Time point

Mean ± SD; Median

Floor percentage (scored “mostly”; %)

Ceiling percentage (scored “never”; %)

Q1

Baseline

3.15 ± 1.19; 3.00

14.7

12.0

Follow-up

3.43 ± 1.14; 4.00

10.7

14.3

Q2

Baseline

3.13 ± 1.26; 3.00

14.7

12.0

Follow-up

3.18 ± 1.25; 3.00

14.3

14.3

Q3

Baseline

3.29 ± 1.39; 4.00

13.7

24.7

Follow-up

3.04 ± 1.37; 3.00

17.9

17.9

Q4

Baseline

2.63 ± 1.46; 2.00

32.0

13.3

Follow-up

2.93 ± 1.44; 3.00

25.0

17.9

Q5

Baseline

3.06 ± 1.39; 3.00

20.8

15.3

Follow-up

3.29 ± 1.21; 3.50

10.7

14.3

Q6

Baseline

3.92 ± 1.13; 4.00

6.8

32.9

Follow-up

3.96 ± 1.00; 4.00

3.6

35.7

Q7

Baseline

3.37 ± 1.34; 4.00

15.1

23.3

Follow-up

3.43 ± 1.17; 4.00

10.7

10.7

Q8

Baseline

3.88 ± 1.13; 4.00

6.7

32.0*

Follow-up

4.18 ± 0.95; 4.00

3.6

42.9*

Q9

Baseline

3.60 ± 1.37; 4.00

13.7

31.5

Follow-up

3.82 ± 1.06; 4.00

7.1

21.4

Q10

Baseline

3.53 ± 1.17; 4.00

8.2

20.5

Follow-up

3.54 ± 1.11; 4.00

10.7

14.3

Q11

Baseline

3.25 ± 1.25; 3.00

13.7

16.4

Follow-up

3.36 ± 1.16; 4.00

10.7

10.7

Q12

Baseline

3.33 ± 1.32; 4.00

14.7

21.3

Follow-up

3.50 ± 1.17; 4.00

7.1

17.9

  1. * Comparisons with statistical difference, p < 0.01