Loss to Followup in HIV-Infected Patients from Asia-Pacific Region: Results from TAHOD
Table 1
Receiver operating characteristic (ROC) analysis for the best-performing definition for loss to followup.
Cutoff (days)
Sensitivity (%)
Specificity (%)
Area under ROC
Cutoff (days)
Sensitivity (%)
Specificity (%)
Area under ROC
10
99.67
16.97
58.32
160
90.96
90.77
90.87
20
99.02
24.32
61.67
170
90.64
91.44
91.04
30
98.05
31.31
64.68
175
90.64
92.05
91.34
40
96.82
39.90
68.36
180
90.55
92.26
91.41
50
96.34
49.52
72.93
185
90.23
92.53
91.38
60
95.77
57.20
76.48
190
89.33
93.01
91.17
70
95.28
65.52
80.40
200
88.52
93.44
90.98
80
95.11
71.26
83.19
210
87.79
94.13
90.96
90
94.71
77.62
86.16
240
85.26
95.25
90.26
100
94.22
80.91
87.57
270
83.55
96.43
89.99
120
93.24
86.18
89.71
300
82.00
97.04
89.52
150
91.53
90.17
90.85
365
78.99
97.73
88.36
True LTFU defined as no patient followup in the 12 month prior to 31 March 2010. Each cutoff used as a potential definition of LTFU was the days between last clinical visit and 31 March 2009 in the March 2009 data transfer. The sensitivity and specificity of each cutoff in identifying true LTFU were calculated, and the optimal cutoff identified based on ROC analysis.
