General information
A total of 1118 cases averaged 50.98 ± 17.97 years of age, the youngest and the oldest of whom were 15 and 90 years of age respectively. 384 controls averaged 36.52 ± 18.01 years of age, the youngest and the oldest of whom were 8 and 93 years of age respectively. Male: female ratio in case and control groups were 2.58:1 and 1.26:1 respectively.
The study participants were classified into four age groups: 60 years of age or older, 40 to 59 years of age, 25 to 39 years of age, 15 to 24 years of age. Significant difference was detected in case and control groups (P < 0.001) and details have been presented in Table 2.
Table 2
Univariate analysis of influencing factors for TB infection
Characteristics | Case (n = 1118)% | Control (n = 384)% | P-Value |
Sex | | | < 0.001 |
Male | 806 (72.09) | 214 (55.73) |
Female | 312 (27.91) | 170 (44.27) |
Age group (yr) | | | < 0.001 |
8–24 | 146 (13.06) | 117 (30.47) |
25–39 | 158 (14.13) | 99 (25.78) |
40–59 | 354 (31.66) | 123 (32.03) |
≥ 60 | 460 (41.15) | 45 (11.72) |
Education | | | < 0.001 |
Primary Schooling or below | 655 (58.59) | 96 (25.00) |
High school | 409 (36.58) | 228 (59.38) |
College degree or above | 54 (4.83) | 60 (15.62) |
Domicile | | | < 0.001 |
Urban dwellers | 133 (11.90) | 86 (22.40) |
Rural dwellers | 985 (88.10) | 298 (77.60) |
Smoking | | | < 0.001 |
Yes | 262 (23.43) | 71 (18.32) |
Quit | 236 (21.11) | 26 (6.54) |
No | 620 (55.46) | 287 (75.13) |
Drinking | | | 0.071 |
Yes | 310 (27.73) | 88 (22.91) |
No | 808 (72.27) | 296 (77.09) |
Average annual income(RMB) | | | < 0.001 |
< 4000 | 421 (37.66) | 120 (31.25) |
4000–11000 | 509 (45.53) | 133 (34.64) |
> 11000 | 188 (16.82) | 131 (34.11) |
Contact with TB patients | | | 0.004 |
Yes | 151 (13.51) | 72 (18.75) |
No | 491 (43.92) | 182 (47.40) |
Have no idea | 476 (42.57) | 130 (33.85) |
BCG vaccination | | | < 0.001 |
Yes | 421 (37.66) | 275 (71.61) |
No | 697 (62.34) | 109 (28.39) |
Living area (m²) | | | 0.028 |
< 30 | 391 (34.97) | 165 (42.97) |
30–60 | 613 (54.83) | 183 (47.66) |
> 60 | 114 (10.20) | 36 (9.37) |
Univariate Analysis Of Knowledge Awareness On Tb Infection
Table 1 showed that questions of “What is the main pathogen causing tuberculosis”, “What is the cardinal symptom of TB patients”, “What is the source of infection of tuberculosis” and “What is the route of transmission of tuberculosis” differed significantly compared with control group (P < 0.05); While there were no significant differences at the questions of “Do you know relevant information about tuberculosis” and “Is tuberculosis a contagious disease” compared with the control group.
Univariate Analysis Of General Influencing Factors
Table 2 showed that sex, age group, education, domicile, smoking, drinking, average annual income, contact with TB patients, BCG vaccination and living area differed significantly compared with the control group (P < 0.05); While there were no significant differences in drinking.
Multivariate logistic regression analysis of knowledge awareness for TB infection
Table 3 showed the results of the multivariable analysis. Four questions above, sex, age, education, domicile, smoking, average annual income and contact with TB patients were put into multivariate logistic regression model to identify the influencing factors for TB. After adjustment for age, education, domicile, smoking status, income, contact with TB patients, the following variables remained in the final model: education(OR = 0.242, P = 0.001), income(OR = 0.555, P = 0.016), domicile (OR = 0.073, P = 0.026), contacting with TB patients (OR = 3.020, P = 0.017).
Table 3
Multivariate logistic regression analysis for knowledge awareness
Factors | B | S.E. | Waldχ2 | OR | 95%CI | P |
Education | -1.420 | 0.330 | 18.473 | 0.242 | 0.126–0.462 | 0.001 |
Domicile | 0.928 | 0.417 | 4.958 | 0.073 | 0.006–0.821 | 0.026 |
Income | -0.589 | 0.245 | 5.795 | 0.555 | 0.344–0.896 | 0.016 |
Contact with TB patients | 1.105 | 0.462 | 5.737 | 3.020 | 1.222–7.463 | 0.017 |
Adjustment for age, education, domicile, smoking status, income, contact with TB patients |