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Table 2 Comparison of the clinical and epidemiological characteristics of the derivation and validation cohorts

From: A predictive scoring instrument for tuberculosis lost to follow-up outcome

Variables 

Total

Derivationa

Validationa

p-valueb

  

N (%)

N (%)

 

Country:

   

0.002

Spain

2080 (67.6%)

1048 (70.3%)

1032 (65.1%)

 

Other

995 (32.4%)

442 (29.7%)

553 (34.9%)

 

Understanding:

   

0.003

Good

2566 (91.7%)

1266 (90.1%)

1300 (93.3%)

 

Poor

232 (8.29%)

139 (9.89%)

93 (6.68%)

 

Living situation:

   

0.250

Alone

312 (10.5%)

157 (10.7%)

155 (10.3%)

 

Homeless or institutionalized

92 (3.10%)

54 (3.69%)

38 (2.52%)

 

Group

376 (12.7%)

189 (12.9%)

187 (12.4%)

 

Family

2191 (73.7%)

1062 (72.6%)

1129 (74.8%)

 

Intravenous drug use:

   

<0.001

No

1399 (45.5%)

872 (58.5%)

527 (33.2%)

 

Yes

49 (1.59%)

21 (1.41%)

28 (1.77%)

 

Unknown

1627 (52.9%)

597 (40.1%)

1030 (65.0%)

 

Age (years):

   

0.449

18-30

986 (32.3%)

497 (33.4%)

489 (31.3%)

 

31-50

1233 (40.4%)

596 (40.0%)

637 (40.8%)

 

>50

834 (27.3%)

397 (26.6%)

437 (28.0%)

 

Human immunodeficiency virus infection:

   

<0.001

No

2284 (74.3%)

1060 (71.1%)

1224 (77.2%)

 

Yes

148 (4.81%)

66 (4.43%)

82 (5.17%)

 

Unknown

643 (20.9%)

364 (24.4%)

279 (17.6%)

 

Use of directly observed treatment:

 

0.017

  

No

2626 (91.1%)

1338 (89.8%)

1288 (92.4%)

 

Yes

258 (8.95%)

152 (10.2%)

106 (7.60%)

 

Sex:

   

0.476

Male

1945 (64.0%)

920 (63.4%)

1025 (64.7%)

 

Female

1092 (36.0%)

532 (36.6%)

560 (35.3%)

 

Country- Healthcare

   

<0.001

Primary care

511 (17.1%)

268 (18.0%)

243 (16.1%)

 

Urgent care

1461 (48.8%)

682 (45.8%)

779 (51.7%)

 

Specialist

476 (15.9%)

210 (14.1%)

266 (17.7%)

 

Unknown'

548 (18.3%)

330 (22.1%)

218 (14.5%)

 

Employment:

   

<0.001

Disabled

98 (3.39%)

68 (4.70%)

30 (2.08%)

 

Employed

1781 (61.6%)

901 (62.3%)

880 (60.9%)

 

Unemployed

547 (18.9%)

257 (17.8%)

290 (20.1%)

 

Retired

464 (16.1%)

220 (15.2%)

244 (16.9%)

 

Previous anti-tuberculosis treatment:

   

0.304

No

2728 (91.5%)

1320 (91.0%)

1408 (92.1%)

 

Yes

252 (8.46%)

131 (9.03%)

121 (7.91%)

 

Lost to follow-up outcome

   

0.974

No

2814 (93.5%)

1332 (93.5%)

1482 (93.5%)

 

Yes

195 (6.48%)

92 (6.46%)

103 (6.50%)

 
  1. aData from the derivation group was used to create the model and data from the validation group was used to valídate the model.
  2. bp values according to χ2 test with correction for continuity.