Skip to main content

Advertisement

Table 1 Comparison of characteristics between the follow-up and lost-to-follow up cohorts, 2013–2015*

From: Incidence and risk factors of tuberculosis among the elderly population in China: a prospective cohort study

VariablesTotalFollow-upLost-to-follow upP
N (%)n (%)n (%)
Total34 07622 11911 957 
Gender
 Male15 913 (46.7)10 385 (47.0)5528 (46.2)0.207
 Female18 163 (53.3)11 734 (53.0)6429 (53.8)
Age groups
 65–7421 592 (63.4)14 452 (65.3)7140 (59.7)< 0.001
  ≥ 7512 484 (36.6)7667 (34.7)4817 (40.3)
Nationality
 Han29 554 (86.7)18 918 (85.5)10 636 (89.0)< 0.001
 Others4507 (13.3)3198 (14.5)1309 (10.9)
 Unknown15(0.1)3 (0.0)12 (0.1)
Education
 Illiteracy12 016 (35.3)8645 (39.1)3371 (28.2)< 0.001
 Primary to secondary17 168 (50.4)11 413 (51.6)5755 (48.1)
 High school and above3663 (10.7)1343 (6.1)2320 (19.4)
 Unknown1229 (3.6)718 (3.2)511 (4.3)
Marital status
 Married24 828 (72.9)15 970 (72.2)8858 (74.1)0.001
 Others#9244 (27.1)6147 (27.8)3097 (25.9)
 Unknown4 (0.0)2 (0.0)2 (0.0)
Residence
Local resident31 316 (91.9)21 487 (97.1)9829 (82.2)< 0.001
Others2760 (8.1)632 (2.9)2128 (17.8)
Annual average income per person in the family (RMB)
  ≥ 10 00016 506 (48.4)8748 (39.5)7758 (64.9)< 0.001
 2300–999911 935 (35.0)9230 (41.7)2705 (22.6)
  < 23004010 (11.8)3058 (13.8)952 (8.0)
 Unknown1625 (4.8)1083 (5.0)543 (4.5)
Diabetes
 No31 690 (93.0)20 697 (93.6)10 993 (91.9)< 0.001
 Yes2386 (7.0)1422 (6.4)964 (8.1)
Previously treated with TB
 No33 503 (98.3)20 530 (98.4)11 750 (98.3)0.367
 Yes573 (1.7)333 (1.6)207 (1.7)
Chronic bronchitis
 No32 346 (94.9)20 905 (94.5)11 441 (95.7)< 0.001
 Yes1632 (4.8)1147 (5.2)485 (4.1)
 Unknown98 (0.3)67 (0.3)31 (0.3)
Pneumoconiosis
 No33 989 (99.7)22 052 (99.7)11 937 (99.8)0.002
 Yes77 (0.2)63 (0.3)14 (0.1)
 Unknown10 (0.0)4 (0.0)6 (0.1)
Cigarette smoker
 Non-smoker27 363 (80.3)17 544 (79.3)9819 (82.1)< 0.001
 Ex/current smoker6707 (19.7)4571 (20.7)2136 (17.9)
 Unknown6 (0.0)4(0.0)2(0.0)
Alcohol drinker
 Non-drinker27 526 (80.9)17 604 (79.6)9922 (83.0)< 0.001
 Ex/current drinker6501 (19.1)4499 (20.3)2002 (16.7)
 Unknown49 (0.1)16 (0.1)33 (0.3)
BMI level
 18.5–23.920 754 (60.9)13 680 (61.8)7074 (59.2)< 0.001
  < 18.53585 (10.5)2477 (11.2)1108 (9.3)
  ≥ 249730 (28.6)5958 (26.9)3772 (31.5)
 Unknown7 (0.0)4 (0.0)3 (0.0)
  1. # Others included single, divorced and widowed. TB Tuberculosis, BMI Body mass index