The World Health Organization Disability Assessment Schedule-2.0 (WHODAS 2.0) in a chronic pain population being considered for chronic opioid therapy

Figures & data

Table 1 Reasons for exclusion for 15 excluded subjects

Reason	n
Did not complete the evaluation visit	2
Family member completed questionnaires	1
No questionnaires completed due to blindness	1
Entire WHODAS 2.0 measure incomplete	2
Entire third page of WHODAS 2.0 measure incomplete	3
5 items of WHODAS 2.0 incomplete^a	1
4 items of WHODAS 2.0 incomplete	3
3 items of WHODAS 2.0 incomplete	2

Notes: ^aincomplete item count does not include items in work/school section if left incomplete

Abbreviations: WHODAS 2.0, World Health Organization Disability Assessment Schedule 2.0.

Table 2 Clinical characteristics for all subjects (n=109)

Variable	Median	First Quartile	Third Quartile	Range
MME	15.0	0.0	62.0	0–400
PHQ-9	6.0	3.0	11.0	0–23
SOAPP-R	14.0	9.0	21.0	0–70
COMM	4.0	2.0	8.0	0–34
ORT	2.0	1.0	5.0	0–16
RMDQ-m	12.0	9.0	16.0	0–24
WHODAS 2.0	25.69	16.01	35.28	0–63.89
Communicating	4.17	0.00	20.83	0–75.00
Getting Around	50.00	30.00	65.00	0–90.00
Self-Care	12.50	0.00	25.00	0–75.00
Getting Along	10.00	5.00	20.00	0–75.00
Activities	31.25	18.75	50.00	0–93.75
Participation	31.25	18.75	46.88	0–93.75

Abbreviations: MME, milligrams morphine equivalent; PHQ-9, Patient Health Questionnaire- 9 item; SOAPP-R, Screener and Opioid Assessment for Patients with Pain- Revised; COMM, Current Opioid Misuse Measure; ORT, Opioid Risk Tool; RMDQ-m, modified Roland Morris Disability Questionnaire; WHODAS 2.0, World Health Organization Disability Assessment Schedule 2.0.

Table 3 Disability measure Spearman correlations for all subjects (n=109, df=107)

	RMDQ-m	WHODAS 2.0	Communicating	Getting around	Self-care	Getting along	Activities	Participation
RMDQ-m	1.00	-	-	-	-	-	-	-
WHODAS 2.0	0.69**	1.00	-	-	-	-	-	-
Communicating	0.36**	0.67**	1.00	-	-	-	-	-
Getting around	0.68**	0.74**	0.23*	1.00	-	-	-	-
Self-care	0.55**	0.77**	0.48**	0.57**	1.00	-	-	-
Getting along	0.34**	0.62**	0.67**	0.22*	0.36**	1.00	-	-
Activities	0.55**	0.77**	0.36**	0.52**	0.52**	0.36**	1.00	-
Participation	0.54**	0.85**	0.61**	0.57**	0.56**	0.53**	0.59**	1.00

Notes: *Correlation is significant at the 0.05 level (2-tailed). ** Correlation is significant at the 0.01 level (2-tailed).

Abbreviations: RMDQ-m, modified Roland Morris Disability Questionnaire; WHODAS 2.0, World Health Organization Disability Assessment Schedule 2.0.

Table 4 Disability measures (median and IQR) by employment status

	Employed (n=42)	Retired (n=24)	Disabled (n=33)	Not Employed (n=9)	Difference Between Groups p
RMDQ-m	10.5 (7.0 to 13.0)	10.0 (7.5 to 15.5)	16.0 (13.0 to 19.0)	17.0 (11.0 to 20.0)	<0.001^a
WHODAS 2.0	20.12 (9.62 to 30.73)	17.31 (13.84 to 26.76)	33.58 (27.92 to 46.42)	30.31 (20.42 to 54.27)	<0.001^b

Notes: Worker’s Compensation employment status has only 1 subject and was excluded from analyses. ^aPost hoc analyses revealed significant differences in RMDQ-m scores between employed and disabled groups (p<0.001), and retired and disabled groups (p=0.003), but not for other group comparisons. ^bPost hoc analyses revealed significant differences in WHODAS 2.0 scores between employed and disabled groups (p<0.001), and retired and disabled groups (p<0.001), but not for other group comparisons.

Abbreviations: IQR, inter-quartile range; RMDQ-m, modified Roland Morris Disability Questionnaire; WHODAS 2.0, World Health Organization Disability Assessment Schedule 2.0.