Test-retest reliability of three life balance measures in people with neuromuscular disease: the activity card sort-NL, the activity calculator, and the occupational balance questionnaire

Figures & data

Table 1. Demographic and clinical characteristics of participants (n = 50).

Characteristics	N (%)
Gender
Male	20 (40)
Female	29 (58)
Unspecified/missing	1 (2)
Age: years mean (SD, range)	58 (11.9, 23–79)
Diagnosis
FSHD	25 (50)
MM	25 (50)
Participants with comorbidity^a	25 (50)
CIS-Fatigue: mean (SD, range) n = 49	32.60 (3.98, 26–41)

FSHD: facioscapulohumeral dystrophy; MM: mitochondrial myopathy; SD: standard deviation; CIS-Fatigue; checklist individual strength, subscale fatigue.

^aMost common comorbidities were: heart disease, visual impairment, and brain injury.

Table 2. Descriptive data of the AC, ACS-NL(18-64) and the OBQ11-NL at T1 and T2.

	T1 mean (SD)	T2 mean (SD)	T1 min-max	T2 min-max
AC Per activity	1.24 (1.25)	1.24 (1.19)	−1–3	−1–3
AC Average total day score	24.41 (12.50)	25.63 (13.25)	−11.33 − 48.00	−11.67 − 48.50
ACS-NL(18-64) % Retained activities	78 (11)	77 (11)	52–101	51–99
ACS-NL(18-64) Average importance per current activity	1.01 (0.322)	0.901 (0.320)	−0.02 − 1.80	−0.24 − 1.54
OBQ11-NL Total score	17.62 (5.08)	18.42 (5.05)	6–32	6–31

AC: Activity Calculator; ACS-NL(18–64): Activity Card Sort-Netherlands (age 18–64); OBQ11-NL: Occupational Balance Questionnaire-Netherlands.

Figure 1. Bland-Altman plot of the difference of scores against the mean scores of the AC- average total day score (n = 50). The solid line represents the mean of differences (-1.22). The two dashed lines define limits of agreement (đ ± 1.95*SD = -8.93 - 6.5.

A scatterplot graph of the AC with on the y-axis the differences of scores against the mean scores on the x-axis. Most data points are within the limits of agreement, with few outliers.

Figure 2. Bland-Altman plot of the difference of scores against the mean scores of the ACS-NL(18-64)-percentage retained activities scores (n = 50). The solid line represents the mean of differences (1.43). The two dashed lines define limits of agreement (đ ± 1.95*SD = -6.91 - 9.77).

A scatterplot graph of the ACS-NL(18-64) with on the y-axis the differences of scores against the mean scores on the x-axis. Most data points are within the limits of agreement, with few outliers.

Table 3. Test-retest reliability of the Activity Calculator (AC), Activity Card Sort-NL (18–64) and OBQ11-NL.

		95% confidence interval		F Test With True Value 0
	ICC	Lower Bound	Upper Bound	Value	df1	Df2	Sig
AC. Weight score per activity	0.80	0.773	0.817	8.80	1083	1083	0.000
AC. Average total day score	0.95	0.911	0.972	41.86	49	49	0.000
ACS-NL(18–64). % retained activities	0.92	0.862	0.957	27.35	49	49	0.000
ACS-NL(18–64). Importance per current activity	0.76	0.680	0.890	8.67	49	49	0.000
OBQ11-NL Total score	0.76	0.620	0.860	7.69	49	49	0.000

ICC-calculations were based on single-rating, absolute agreement, two-way mixed-method model.

Figure 3. Bland-Altman plot of the difference of scores against the mean scores of the OBQ11-NL (n = 50). The solid line shows the mean absolute difference (-0.80), while the two dashed lines show the absolute limits of agreement: (đ ± 1.95*SD = -7.53–5.93).

A scatterplot graph of the OBQ11-NL with on the y-axis the differences of scores against the mean scores on the x-axis. Most data points are within the limits of agreement, with few outliers.