Development of a metric for tracking and comparing population health based on the minimal generic set of domains of functioning and health

Table 2 Results on internal consistency reliability

Measure	Wave 3	Wave 4	Waves 3 and 4 combined
Inter-item correlation: mean [min; max]	0.54 [0.23; 0.90]	0.53 [0.24; 0.92]	0.53 [0.25; 0.91]
Item-to-total correlation: mean [min; max]	0.76 [0.61; 0.84]	0.75 [0.59; 0.85]	0.75 [0.60; 0.84]
Cronbach’s alpha	0.93	0.93	0.93
McDonald’s omega hierarchical	0.60	0.61	0.61
McDonald’s omega total	0.96	0.95	0.96

ISSN: 1478-7954