Quality appraisal of generic self-reported instruments measuring health-related productivity changes: a systematic review

Table 3 Methodological quality of each study per measurement property per instrument

Instrument and paper	Internal consistency	Reliability	Measurement error	Content validity	Structural validity	Hypotheses testing	Cross-cultural validity	Criterion validity	Responsiveness
WLQ
Beaton [26]	Poor	.	.	.	.	Fair	.	.	Fair
Erickson [19]	Poor	.	.	.	.	Poor	.	Poor	Poor
Lerner [36]	Poor	Fair	.	Good	.	Poor	.	Poor	.
Lerner [37]	Good	.	.	Fair	Good	.	.	Poor	.
Ozminkowski [21]	.	.	.	.	.	.	.	Fair	.
Roy [28]	.	.	.	.	.	Fair	.	Good	Fair
Tang [27]	Fair	.	.	Fair	.	Fair	.	.	.
Walker [42]	Excellent	.	.	.	Good	.	.	.	.
EWPS
Endicott [29]	Poor	Poor	.	.	.	Fair	.	Poor	.
Erickson [19]	Poor	.	.	.	.	Poor	.	Poor	Poor
WPAI
Erickson [19]	Poor	.	.	.	.	Poor	.	Poor	Poor
Reilly [39]	.	Poor	Poor	.	.	Fair	.	Fair	.
Zhang [22]	.	.	.	.	.	Fair	.	Fair	.
WPSI
Erickson [19]	Poor	.	.	.	.	Poor	.	Poor	Poor
Goetzel [31]	.	Poor	.	Poor	.	Poor	.	Poor	Poor
Ozminkowski [21]	.	.	.	.	.	.	.	Fair	.
AMA-guides
Forst [30]	.	Poor	.	.	.	Poor	.	Poor	.
WHO-HPQ
Kessler [33]	.	.	.	Good	.	Poor	.	Good	.
Kessler [32]	.	Fair	.	Good	Fair	Fair	.	Fair	Poor
SPS
Koopman [34]	Good	.	.	Fair	Good	Fair	.	Fair	.
Turpin [41]	Good	Fair	.	.	Good	Fair	.	Fair	.
PRODISQ
Koopmanschap [24]	.	.	.	Excellent	.	.	.	.	.
HRPQ-D
Kumar [35]	.	Fair	.	Poor	.	Poor	.	Fair	Fair
HLQ
Meerding [20]	.	Fair	.	.	.	.	.	Fair	.
van Roijen [25]	.	.	.	.	.	.	.	Fair	.
Q&Q
Meerding [20]	.	Fair	.	.	.	.	.	Fair	.
WBA-P
Prochaska [38]	.	.	.	.	Good	.	.	Good	.
HWQ
Shikiar [40]	Fair	.	.	.	Fair	.	.	Fair	Poor
WHI
Stewart [43]	.	Good	.	.	.	.	.	Good	Fair
VOLP
Zhang [23]	.	Good	.	.	.	.	.	Good	.

WLQ = Work Limitations Questionnaire; EWPS = Endicott Work Productivity Scale; WPSI = Work Productivity Short Inventory; WPAI = Work Productivity and Activity Impairment Instrument; AMA-guide = American Medical Association-Guides; WHO HPQ = World Health Organization Health and work Performance Questionnaire; SPS = Stanford Presenteeism Scale; PRODISQ = PROductivity and Disease Questionnaire; HRPQ-D = Health-Related Productivity Questionnaire Diary; HLQ = Health and Labor Questionnaire; Q&Q = Quality and Quantity questionnaire; WBA-P = Well-Being Assessment for Productivity; HWQ = Health and Work Questionnaire; WHI = Work and Health Interview; VOLP = Valuation of Lost Productivity questionnaire.

ISSN: 1471-2458