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Table 1 Summary of variables and validation measures estimated in the medical record and case report

From: Assessing the validity of tuberculosis surveillance data in California

Variable Type
(n, %)
Variable Number* Medical Record Values Report of Verified Case of Tuberculosis (RVCT) Values Number of Values and Validation Measures Estimated
  n = 34 (77%) 1, 3, 4, 7, 8, 9,
10, 11, 12, 13,
15, 16, 17, 19,
21, 22, 24, 25,
26, 27, 28, 29,
30, 31, 32, 33,
34, 35, 39, 40,
41, 42, 43, 44
'Yes'
'No'
'Not Charted'
'Yes'
'No'
'Not Done'
(n = 15)
'Unknown'
2 × 2 tables:
 Concordance
 Sensitivity
 Positive Predictive Value
Categorical
n = 44
  2, 6, 14, 23,
36, 37, 38
Various values Various values n × n tables
(values = 3–6):
     Concordance
  n = 10 (23%)     2 × 2 tables: collapsed n × n tables to n (2 × 2) tables
           Sensitivity
     Positive Predictive Value
   5, 18, 20    n × n tables (values=96–268):
     Concordance
Dates
n = 9
n = 7 (78%) Month/Day/Year
46, 48, 49, 50,
51, 52, 53
MM/DD/YYYY MM/DD/YYYY Absolute mean difference (days)
  n = 2 (22%) Month/Year
45, 47
MM/DD/YYYY MM/YYYY Absolute mean difference (months)
  1. * See Table 2, first column, for variable number (Note: these numbers do not correspond to the variable numbers on the RVCT form).
  2. † For each of the n values, we constructed a 2 × 2 table from (1) the number of individuals for which the medical record and RVCT both exhibited that value, (2) the number for which only the medical record exhibited that value, (3) the number for which only the RVCT exhibited that value, and (4) the number for which neither exhibited that value. Specifically, for each k (k = 1, ..., n), we constructed a collapsed 2 × 2 table of values
  3. x i j ( k ) MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWG4baEdaqhaaWcbaGaemyAaKMaemOAaOgabaGaeiikaGIaem4AaSMaeiykaKcaaaaa@341B@ (i = 1, 2; j = 1, 2) according to for each k = 1, ..., n. with a lm being the values in the original n × n table (l = 1, ..., n, m = 1, ...n). (Here, δ ab is the Kronecker delta, i.e., δ ab = 1 if a = b and 0 otherwise.)