Table 3 Performance comparison between nomogram and CURB-65

180-day mortality

Nomogram

142

0.768(0.695–0.842)

0.837(0.727–0.948)

0.700(0.662–0.737)

0.172(0.12–0.223)

0.983(0.970–0.995)

CURB-65

2

0.573(0.488–0.659)

0.326(0.186–0.466)

0.821(0.790–0.852)

0.120(0.061–0.178)

0.942(0.922–0.963)

90-day mortality

Nomogram

142

0.783(0.700-0.865)

0.880(0.753 -1.000)

0.685(0.648–0.723)

0.105(0.064–0.147)

0.993(0.984–1.001)

CURB-65

2

0.547 (0.44–0.651)

0.280(0.104–0.456)

0.815(0.784–0.846)

0.060(0.017–0.103)

0.964(0.948–0.980)

30-day mortality

Nomogram

142

0.750(0.583–0.918)

0.833(0.535- 1.000)

0.667 (0.630–0.705)

0.024(0.003–0.045)

0.998(0.993–1.002)

CURB-65

2

0.573(0.369–0.777)

0.333(-0.044 -0.711)

0.812(0.781–0.843)

0.017(-0.006-0.041)

0.992(0.984-1.000)

In-hospitalization mortality

Nomogram

142

0.766(0.655–0.876)

0.857(0.674-1.000)

0.674(0.637–0.712)

0.057(0.026–0.089)

0.995(0.988–1.002)

CURB-65

2

0.623(0.478–0.768)

0.429(0.169–0.688)

0.817(0.786–0.847)

0.051 (0.011–0.091)

0.984(0.973–0.995)