Four-year review of presenteeism data among employees of a large United States health care system: a retrospective prevalence study

Table 2 Internal consistency of minutes of productivity loss for the four productivity areas by medical condition

Medical condition	Cronbach α
Any allergies (including seasonal)	0.73 (0.71–0.75)
Any cancer	0.78 (0.69–0.88)
Arthritis	0.65 (0.61–0.68)
Asthma	0.84 (0.81–0.90)
Autoimmune disease	0.88 (0.86–0.91)
Cerebrovascular disease/stroke^a	0.64 (0.51–0.77)
Chronic back pain	0.77 (0.73–0.81)
Depression	0.85 (0.80–0.89)
Digestive disorder	0.82 (0.75–0.85)
General anxiety	0.84 (0.82–0.85)
Heart disease	0.69 (0.38–0.84)
Hypertension (high blood pressure)	0.77 (0.62–0.85)
Mental illness	0.85 (0.80–0.88)
Migraines or severe headaches	0.87 (0.85–0.89)
Neck pain	0.74 (0.67–0.85)
Other metabolic disease (thyroid, kidney/renal, liver)	0.87 (0.80–0.93)
Peripheral vascular disease^b	0.78 (0.67–0.99)
Pulmonary disease	0.62 (0.33–0.82)
Respiratory (chronic bronchitis, emphysema, or sinusitis)	0.90 (0.82–0.96)
Seizure disorders	0.91 (0.88–0.94)
Type I diabetes	0.71 (0.20–0.92)
Type II diabetes	0.87 (0.82–0.91)

Data are presented as mean (minimum to maximum) for the four yearly periods
^aCronbach α was not estimable for all four periods because there was no variation in minutes for at least one of the productivity areas. Only two periods were assessed for this condition
^bCronbach α was not estimable for all four periods because there was no variation in minutes for at least one of the productivity areas. Only three periods were assessed for this condition

ISSN: 1478-4491