Table 1. Socio-demographic and clinical characteristics of the study participants.
| Variables | Case | Control | Total | pa |
| Age | 0.0001 | |||
| Mean | 33.9 | 37.9 | 36.9 | |
| Median | 30 | 35 | 35 | |
| SD | 12.3 | 14.1 | 13.8 | |
| Sex | 0.027 | |||
| Male | 167 (66.8%) | 442 (58.9%) | 609 (60.9%) | |
| Female | 83 (33.2%) | 308 (41.1%) | 391 (39.1%) | |
| Education | <0.0001 | |||
| None | 55(22%) | 298 (39.7%) | 353 (35.3%) | |
| Secondary and below | 175 (70%) | 398 (53.1%) | 573 (57.3%) | |
| Higher secondary and above | 20 (8%) | 54 (7.2%) | 74 (7.4%) | |
| Occupation | ||||
| None | 9 (3.6%) | 58 (7.7%) | 67 (6.7%) | <0.0001 |
| Service | 74 (29.6%) | 135 (18%) | 209 (20.9%) | |
| Others b | 108 (43.2%) | 447 (59.6%) | 555 (55.5%) | |
| Business | 46 (18.4%) | 79 (10.5%) | 125 (12.5%) | |
| Transport worker | 13 (5.2%) | 31 (4.1%) | 44 (4.4%) | |
| Income (BDT) c | ||||
| Mean | 13066.0 | 11820.2 | 12132.0 | 0.1206 |
| Median | 10000 | 10000 | 10000 | |
| SD | 11016.3 | 10965.8 | 13.8 | |
| Person living per room | 0.069 | |||
| Four or less | 215 (86%) | 676 (90.1%) | 891 (89.1%) | |
| More than four | 35 (14%) | 74 (9.9%) | 109 (10.9%) | |
| Weight (killogram) | ||||
| Mean | 42.5 | 44.6 | 44.0 | 0.002 |
| Median | 41.0 | 44.0 | 43.0 | |
| SD | 9.7 | 9.1 | 9.3 | |
| BCG vaccination status | 0.056 | |||
| Absent | 123 (49.2%) | 317 (42.3%) | 440 (44%) | |
| Present | 127 (50.8%) | 433 (57.7%) | 560 (56%) | |
| Previous history of TB treatment | <0.0001 | |||
| No | 5 (2%) | 702 (93.6%) | 707 (70.7%) | |
| Yes | 245 (98%) | 48 (6.4%) | 293 (29.3%) | |
| Cavitation in chest X-ray d | <0.0001 | |||
| Absent | 136 (90.7%) | 330 (98.2%) | 466 (95.9%) | |
| Present | 14 (9.3%) | 6 (1.8%) | 20 (4.1%) | |
| History of Health care work | 0.144 | |||
| Absent | 246 (98.4%) | 722 (96.3%) | 968 (96.8%) | |
| Present | 4 (1.6%) | 28 (3.7%) | 32 (3.2%) | |
| Contact of TB patient | 0.496 | |||
| Absent | 153 (61.2%) | 477 (63.6%) | 630 (63%) | |
| Present | 97 (38.8%) | 273 (36.4%) | 370 (37%) | |
| Smoking status | <0.0001 | |||
| Never smoked | 125 (50%) | 409 (54.5%) | 534(53.4%) | |
| Current smoker | 1(0.4%) | 82 (10.9%) | 83 (8.3%) | |
| Past smoker | 124 (49.6%) | 259 (34.5%) | 383 (38.3%) | |
| Substance misuse | 0.013 | |||
| Absent | 213(85.2%) | 681 (90.8%) | 894 (89.4%) | |
| Present | 37 (14.8%) | 69 (9.2%) | 106 (10.6%) | |
| Type-2 Diabetes | <0.0001 | |||
| Absent | 216 (86.4%) | 701 (93.5%) | 917 (91.7%) | |
| Present | 34 (13.6%) | 49 (6.5%) | 83 (8.3%) | |
| Kidney disease | 1.000 | |||
| Absent | 248 (99.2%) | 745 (99.3%) | 993 (99.3%) | |
| Present | 2 (0.8%) | 5 (0.7%) | 7 (0.7%) | |
| Other disease e | 0.831 | |||
| Absent | 242 (96.8%) | 728 (97.1%) | 970 (97%) | |
| Present | 8 (3.2%) | 22 (2.9%) | 30 (3%) | |
| Hospitalization history f | 0.194 | |||
| Absent | 246 (98.4%) | 724 (96.7%) | 970 (97.1%) | |
| Present | 4 (1.6%) | 25 (3.3%) | 29 (2.9%) | |
a
P is the Probability of t-test or Chi-square (χ 2) tests. Fisher's exact Chi-square (χ 2) test was used for history of health care work, kidney disease, other disease, smoking status and hospitalization history.
b
‘Others’ subgroup under ‘Occupation’ includes housewife and self-employed small works.
c
BDT: Bangladeshi currency.
d
Cavitation related information was not available in 51% of the participants.
e
Other disease included hypertension, heart diseases, asthma, chronic obstructive pulmonary diseases and chronic dysentery.
f
Hospitalization history had one missing value.