Table 2.
Sensitivity and Specificity of Self‐Report for Any Use of Three Types of Health Care Services in the Past 12 Months among Homeless Adults
| Ambulatory Care Visits | Emergency Department Encounters | Hospitalizations | |
|---|---|---|---|
| Sensitivity (%) | 89.0 | 80.3 | 72.8 |
| Specificity (%) | 37.4 | 83.2 | 91.4 |
| Kappa coefficient (95% CI)a | 0.28 (0.21, 0.35) | 0.63 (0.59, 0.68) | 0.61 (0.55, 0.67) |
| Strength of agreementb | Fair | Substantial | Substantial |
a
Agreement between self‐reported and documented health care utilization, dichotomized as yes/no.
b
Defined based on kappa statistic ranges for strength of agreement provided in Landis and Koch (1977).
CI, confidence interval.