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. 2017 Nov 17;12(11):e0188378. doi: 10.1371/journal.pone.0188378

Table 2. Association between key demographic, biological, and occupational factors, and potential toxic optic neuropathy among beedi rollers in selected rural areas of Dakshina Kannada district, Karnataka, India, April-Sept 2016 (N = 365).

Study variable Possible
TON
Total χ2 p value
No Yes
Gender
Female 277
(82.0%)
61
(18.0%)
338
(100.0%)
0.8 0.443
Male 24
(88.9%)
3
(11.1%)
27
(100.0%)
Tobacco intake
No 291
(83.6%)
57
(16.4%)
348
(100.0%)
6.8 0.017
Yes 10
(58.8%)
7
(41.2%)
17
(100.0%)
Diabetes
No
298
(84.4%)
55
(15.6%)
353
(100.0%)
28.3 <0.001
Yes 3
(25.0%)
9
(75.0%)
12
(100.0%)
Hypertension
No 277
(83.4%)
55
(16.6%)
332
(100.0%)
2.38 0.123
Yes 24
(72.7%)
9
(27.3%)
33
(100.0%)
History of
tuberculosis
Absent 300
(82.4%)
64
(17.6%)
364
(100.0%)
0.2 1.0
Present 1
(100.0%)
0
(0%)
1
(100.0%)