Table 4.

Sensitivity, specificity, PPVs, and NPVs across patient characteristics

TotalFirst Outpatient Nephrology ConsultationFirst Nephrology Consultation (Any)
SensitivitySpecificityNPVPPVAccuracySensitivitySpecificityNPVPPVAccuracy
Overall80,5090.490.850.690.720.700.460.860.630.750.67
Age (yr)(P<0.001)(P<0.006)
 67–70 16,5550.490.850.680.720.690.460.850.620.750.66
 71–75 20,6150.500.840.680.720.690.470.850.620.750.66
 76–80 20,1470.500.850.680.720.700.470.850.630.750.67
 81–85 15,3350.480.860.700.710.700.450.870.650.740.67
 86–90 64470.470.870.720.710.720.440.880.670.740.69
 >90 14100.510.900.800.710.780.460.910.740.740.74
Sex(P<0.001)(P<0.001)
 male43,0420.500.840.680.710.690.470.840.630.740.66
 female37,4670.490.870.700.730.710.450.870.640.760.68
Race(P<0.001)(P<0.001)
 white63,7440.500.850.690.720.700.480.860.640.760.68
 black13,9610.450.850.670.700.680.410.860.590.730.63
 Asian21540.440.870.680.710.690.410.870.630.730.66
 Native American6180.530.820.770.610.720.510.830.730.650.71
 other320.590.700.440.810.620.590.700.440.810.62
Disease group(P<0.001)(P<0.001)
 diabetes31,8930.480.830.640.720.660.450.830.570.750.63
 hypertension29,1360.490.850.680.720.690.460.850.630.750.66
 GN39000.590.820.670.760.710.580.820.640.780.70
 CKD9900.600.670.460.790.620.590.670.420.800.61
 other disease14,5900.480.910.820.680.790.450.920.780.710.77
Year(P<0.001)(P<0.001)
 200512,1690.480.860.710.700.710.440.870.650.740.68
 200624,1820.490.860.700.720.700.460.870.640.750.67
 200722,4700.500.850.690.720.700.460.860.630.750.67
 200821,6880.500.840.670.720.680.470.840.610.750.66
  • Timing of nephrology care dichotomized at 12 months. P values based on chi-squared test of association between agreement and patient characteristics.