Table 1

Pooled responses about clarity to four physical-function itemsa

Item stem and response options

Number

% Rated unclear (SEb)


Are you able to [...]

258

7.75 (0.02)

1. Without any difficulty

2. With a little difficulty

3. With some difficulty

4. With much difficulty

5. Unable to do)

Does your health now limit you in [...]

270

7.78 (0.02)

1. Not at all

2. Very little

3. Somewhat

4. Quite a lot

5. Cannot do

Due to my health [...] is

270

10.74 (0.02)

1. Impossible

2. Very difficult

3. Slightly difficult

4. Easy

5. Very easy

How easy is it for you to [...]

258

11.63 (0.02)

1. Very easy

2. Easy

3. Slightly difficult

4. Difficult

5. Very difficult

6. Impossible

For me, [...] is ...

258

15.12 (0.02)

1. Very easy

2. Easy

3. Slightly difficult

4. Difficult

5. Very difficult

6. Impossible

Does your health now limit you in [...]? If so, how much?a

136

17.65 (0.03)

1. Yes, limited a lot

2. Yes, limited a little

3. No, not limited at all


aBathe and dress yourself, climb several flights of stairs, open a new milk carton, and run errands and shop.

bStandard error.

cPF-10 items, normally presented in grid format, were originally presented as single items with two-part questions. Only item stems and response options varied.

Bruce et al. Arthritis Research & Therapy 2009 11:R191   doi:10.1186/ar2890

Open Data