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Two questions: "walk down stairs" (Q 12) and "squinting one eye" (Q 21) had a factor loading of <0.50 on all factors.
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The pain subscales comprise five questions (walking on a flat surface, going up/down stairs, at night while in bed, when sitting/lying, and when standing upright), each assessed on a 100-mm visual analog scale (VAS), and summed to give a total score out of 500.
Mobility limitation was also categorized on the basis of participants' responses to two questions asking about difficulty experienced walking two or three blocks and walking up to ten steps without resting.
Functional status was assessed with the use of two questions (being able to 1. walk two to three blocks outside on level ground and 2. climb 10 steps unassisted and without using special aids) from the instrumental activities of daily living (IADL) questionnaire [ 36].
Slowness was operationalized using two questions: "Because of health problems, do you have difficulty walking 100 m, or climbing one flight of stairs without resting?".
Adopting a taxonomy of BCTs, this systematic review addressed two questions: (a) What are the behavior change techniques used in walking and cycling interventions targeted at adults?
He answered just two questions in the space of four minutes and 58 seconds before walking out.
We measure the answers to the two questions in terms of strikeout rate, or strikeouts per nine innings (K/9), and walk rate (BB/9).
I have two questions.
And two questions.
That leaves two questions.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com