Table 1. Baseline Demographic Characteristics.

Participant	Item	Frequencies or means (Standard Deviations (SD))
		Site 1 (n=4)	Site 2 (n=6)	Total
People Living With Dementia	Gender
	Male	2	3	5
	Female	2	3	5
	Mean age (SD)	73.75 (0.96)	81.17 (5.04)	78.20 (5.39)
	Relationship status
	Married / Civil partnership	3	5	8
	With partner	1	0	1
	Widowed	0	1	1
	Current living situation
	Living with family/friends	4	6	10
	Level of education
	Primary	0	2	2
	Secondary	2	2	4
	Higher education college / university	1	0	1
	Further education / professional qualification	1	2	3
	Ethnicity
	White	4	6	10
	Dementia type
	Alzheimer’s	3	6	9
	Mixed Alzheimer's & Vascular	1	0	1
	Mean number of months diagnosed with dementia (SD)	21 (22.23)	25.67 (28.56)	23.80 (24.97)
	Other chronic conditions
	Yes	3 (Glaucoma, high pressure and headache/hypertension/sarcoidosis1)	4 (Fibromyalgia2 and stroke/prostate cancer and diverticulitis3/neuralgia4/hypertension)	7
	No	1	2	3
	Uses a walking aid?
	No	4	6	10
	Mean prescribed daily medications (SD)	3.5 (1.29)	5.5 (4.32)	4.7 (3.47)
	Falls in the last year?
	Yes	0	1 (minor injury)	1
	No	4	5	9
	Falls in the last month?
	Yes	0	1 (minor injury)	1
	No	4	5	9
	Frequency of moderate PA practise
	Everyday	1	2	3
	3 times per week	1	0	1
	2 times per week	2	1	3
	Weekly	0	1	1
	Rarely/never	0	2	2
	Frequency of vigorous PA practise
	Monthly	1	0	1
	Rarely/never	3	6	9
People Living With Dementia	Previous experience practising Tai Chi?
	No	4	6	10
	Mean confidence about being able to practise Tai Chi for at least 20 minutes per day (SD)5	1.75 (0.96)	2.67 (1.21)	2.3 (1.16)
	Mean intention to practise Tai Chi for at least 20 minutes per day (SD)6	2.25 (0.96)	2.17 (0.75)	2.2 (0.79)
Carers	Gender
	Male	2	2	4
	Female	2	4	6
	Mean age (SD)	69.25 (1.5)	74.5 (5.96)	72.40 (5.28)
	Relationship with the person living with dementia
	Spouse/partner	4	5	9
	Other	0	1 (niece)	1
	Live with the person living with dementia
	Yes	4	6	10
	Relationship status
	Married / Civil partnership	3	6	9
	With partner	1	0	1
	Current living situation
	Living with family/friends	4	6	10
	Level of education
	Primary	0	1	1
	Secondary	1	2	3
	Higher education college/university	2	1	3
	Further education/professional qualification	1	2	3
	Ethnicity
	White	4	6	10
	Previous experience practising Tai Chi?
	No	4	6	10
	Mean confidence about being able to practise Tai Chi for at least 20 minutes per day (SD)5	1.33 (0.58)	1.17 (1.17)	1.89 (1.05)
	Mean intention to practise Tai Chi for at least 20 minutes per day (SD)6	1.33 (0.58)	2 (1.1)	1.78 (0.97)

¹Sarcoidosis is a disease “characterized by the formation of immune granulomas” in any organ affected (Strookappe et al., 2015, p. 701). If present, symptomatology generally disappears spontaneously or with adequate treatment without further consequences for the patient (Judson, 2015).

²Fibromyalgia is a syndrome characterised by chronic “widespread pain” and possibly other physical (i.e., “muscle stiffness”) and psychological (“memory and concentration” difficulties) manifestations (NHS, 2016).

³Diverticulitis is an infection caused by bacterial accumulation in “small bulges that stick out of the side of the large intestine” which is generally cured after dietary, pharmacological or (rarely) surgical intervention (NHS, 2014).

⁴Neuralgia is the pain caused by nerve irritation or damage (Shelat, 2016).

⁵Participants were asked to rate their confidence using a Likert scale from 1 (true) to 7 (false), where 1 was the best score –showing participants’ confidence about being able to practise for 20 minutes per day.

⁶Participants were asked to rate their intention using a Likert scale from 1 (likely) to 7 (unlikely), where 1 was the best score –showing participants’ intention to practise for at least 20 minutes per day.