Table 1 Characteristics of outcome, modifiable and stable variables

MSQOL

Physical health composite^a

59.0 (21.5)

Mental health composite^a

66.6 (21.4)

Latitude (degrees) ^a

41.0 (8.7)

Diet (DHQ total) ^a

78.9 (12.1)

Current smoker ^b

268/2289 (11.7)

Alcohol consumption ^b

Low

1398/2275 (61.5)

Moderate

858/2275 (37.7)

High

19/2275 (0.8)

Vitamin D supplementation ^b

Low

1747/2194 (79.6)

High

447/2194 (20.4)

Exercise (IPAQ) ^b

Low

922/2232 (41.3)

Moderate

707/2232 (31.7)

High

603/2232 (27.0)

Omega 3 supplementation ^b

None

806/2198 (36.7)

Flaxseed only

204/2198 (9.3)

Fish oil only

793/2198 (36.0)

Both

395/2198 (18.0)

Meditation ^b

Never or less than once a week

1568/2243 (69.9)

Once a week or more

675/2243 (30.1)

BMI ^b

Obese

439/2284 (19.2)

Overweight

521/2284 (22.8)

Normal

1230/2284 (53.9)

Underweight

94/2284 (4.1)

Number of support people ^b

One or none

596/2224 (26.8)

Two or more

1628/2224 (73.2)

Age ^a

45.6 (10.6)

Gender ^b

Male

403/2288 (17.6)

Employment ^b

Employed full or part time

1323/2256 (55.3)

Student or stay at home carer

244/2256 (10.2)

Unemployed

175/2256 (7.8)

Retired due to age or disability

602/2256 (26.7)

Marital status ^b

Partnered

1691/2281 (74.1)

Single

327/2281 (14.4)

Separated

263/2281 (11.5)

Education level ^b

Didn’t complete high school

46/2303 (2.0)

Completed high school/trade

886/2303 (38.5)

Completed bachelor/higher degree

1371/2303 (59.5)

Number of comorbidities ^c

1 (0,2)

Disability scale ^b

Normal to some

1267/2299 (55.1)

Gait/cane

792/2299 (34.5)

Major mobility

240/2299 (10.4)

Years since diagnosis ^c

6 (3,12)

Country of origin

Australasia

808/2312 (34.9)

Europe

606/2312 (26.2)

North America

841/2312 (36.4)

Other

57/2312 (2.5)

DMD use

Yes

1096/2312 (51.4)