|
Year
|
Enrollment of freshmen
|
# of follow-up
|
Sex
|
Age (means ± SD)
|
TST positive(%)
|
Strong TST positive(%)
|
|---|
|
Male(%)
|
Female(%)
|
|---|
|
2013
|
14899
|
14592
|
45.59
|
54.41
|
19.78 ± 1.53
|
10.85
|
5.10
|
|
2014
|
20081
|
19823
|
51.70
|
48.30
|
19.52 ± 1.13
|
10.60
|
4.61
|
|
2015
|
18914
|
18659
|
58.63
|
41.37
|
19.37 ± 0.95
|
13.53
|
6.92
|
|
2016
|
14394
|
14218
|
59.86
|
40.14
|
19.35 ± 1.04
|
12.74
|
6.54
|
|
Total
|
68288
|
67292
|
54.02
|
45.98
|
19.52 ± 1.26
|
11.92
|
5.76
|
- TST positive: induration size ≥10 mm or the presence of blister or necrosis
- Strong TST positive: induration size ≥15 mm or the presence of blister or necrosis
