Table 2.
Characteristics of subjects according to the quartile of monthly household income
| Variables | Monthly household income | ||||
|---|---|---|---|---|---|
| Lowest | Medium-lowest | Medium-highest | Highest | P | |
| TB prevalence (/100,000) | 181.7(105.3-313.6) | 63.0(30.7-129.6) | 61.1(27.8-134.2) | 14.3(4.1–49.5) | < 0.001 |
| Current TB treatment (/100,000) | 140.2(73.5-267.3) | 69.6(35.3–137.0) | 52.8(22.0-126.9) | 6.9(1.0-48.8) | < 0.001 |
| Gender | < 0.001 | ||||
| Male | 42.8(41.6–43.9) | 48.1(47.2–48.9) | 50.9(50.1–51.7) | 52.1(51.4–52.9) | |
| Female | 57.2(56.1–58.4) | 51.9(51.1–52.8) | 49.1(48.3–49.9) | 47.9(47.1–48.6) | |
| Age (years) | < 0.001 | ||||
| ≤ 40 | 20.2(18.6–21.8) | 37.4(36.1–38.7) | 43.8(42.6–44.9) | 42.2(41.1–43.3) | |
| 41–64 | 30.2(29.0-31.5) | 43.7(42.6–44.8) | 47.2(46.1–48.3) | 52.3(51.3–53.4) | |
| ≥ 65 | 49.7(48.0-51.3) | 18.9(18.0-19.8) | 9.0(8.5–9.6) | 5.5(5.1-6.0) | |
| Body mass index (kg/m2) | < 0.001 | ||||
| < 18.5 | 4.6(4.0-5.2) | 4.7(4.2–5.2) | 4.0(3.6–4.4) | 4.4(4.0-4.8) | |
| 18.5–22.9 | 36.2(34.9–37.5) | 36.7(35.7–37.8) | 38.6(37.7–39.6) | 40.0(39.1–41.0) | |
| 23.0–24.9 | 22.6(21.6–23.6) | 22.7(21.8–23.6) | 22.0(21.2–22.8) | 23.1(22.4–23.9) | |
| ≥ 25.0 | 36.7(35.4–38.0) | 35.9(34.8–37.0) | 35.4(34.4–36.4) | 32.5(31.5–33.4) | |
| Survey year | 0.039 | ||||
| KNHANES VI (2013–2015) | 31.7(29.9–33.5) | 32.4(30.9–33.9) | 31.3(29.8–32.7) | 29.7(28.0-31.5) | |
| KNHANES VII (2016–2018) | 35.8(33.9–37.7) | 33.8(32.3–35.3) | 34.3(32.8–35.8) | 33.5(31.6–35.3) | |
| KNHANES VIII (2019–2021) | 32.5(30.7–34.3) | 33.9(32.4–35.4) | 34.4(32.9–36.0) | 36.8(34.8–38.8) | |
| Education (year) | < 0.001 | ||||
| ≤ 6 | 45.3(43.7–47.0) | 17.2(16.4–18.1) | 8.0(7.5–8.5) | 3.6(3.3-4.0) | |
| 7–9 | 12.8(12.0-13.6) | 11.7(11.0-12.4) | 7.8(7.3–8.4) | 4.7(4.4–5.2) | |
| 10–12 | 28.8(27.3–30.3) | 40.6(39.4–41.7) | 40.4(39.3–41.5) | 34.3(33.2–35.4) | |
| ≥ 13 | 13.1(12.1–14.1) | 30.5(29.3–31.7) | 43.8(42.6–45.1) | 57.3(56.1–58.5) | |
| Marital status | < 0.001 | ||||
| Single | 51.5(49.9–53.0) | 32.9(31.7–34.1) | 30.3(29.2–31.4) | 30.1(29.0-31.1) | |
| Married | 48.5(47.0-50.1) | 67.1(65.9–68.3) | 69.7(68.6–70.8) | 69.9(68.9–71.0) | |
| Residential area | < 0.001 | ||||
| Urban | 74.7(71.9–77.3) | 82.1(80.0–84.0) | 85.9(83.9–87.6) | 88.9(87.1–90.4) | |
| Rural | 25.3(22.7–28.1) | 17.9(16.0–20.0) | 14.1(12.4–16.1) | 11.1(9.6–12.9) | |
| Number of household numbers | < 0.001 | ||||
| 1 | 29.2(27.7-3)0.7 | 9.6(8.9–10)0.4 | 6.4(5.7-7.)1 | 5.0(4.4-5.)5 | |
| 2–4 | 65.2(63.6-6)6.7 | 79.8(78.6–81.0) | 82.6(81.5–83.7) | 85.1(84.1–86.1) | |
| ≥ 5 | 5.7(4.8–6.7) | 10.6(9.6-1)1.6 | 11.0(10.0–12.0) | 9.9(9.0–10)0.9 | |
| Smoking | 19.0(17.9–20.2) | 21.6(20.7–22.6) | 22.9(22.0-23.9) | 19.5(18.6–20.3) | < 0.001 |
| Alcohol intake | 41.1(39.7–42.5) | 54.8(53.7–55.9) | 60.6(59.5–61.7) | 64.7(63.7–65.6) | < 0.001 |
| Physically activea | 41.9(40.5–43.3) | 45.5(44.4–46.6) | 45.9(44.8–47.0) | 48.3(47.2–49.4) | < 0.001 |
| Health examination during past 2 yearsb | 57.0(55.7–58.3) | 60.2(59.0-61.3) | 66.1(65.1–67.1) | 72.5(71.5–73.4) | < 0.001 |
| Cancer examination during past 2 yearsc | 49.0(47.6–50.4) | 50.1(48.9–51.3) | 51.8(50.7–52.9) | 57.5(56.5–58.6) | < 0.001 |
All values are given as number and estimated percentage (95% confjdence interval).
TB; tuberculosis, KNHANES; the Korea national health and nutrition examination survey
aPhysically active was indicated as ‘yes’ when the subject walked for more than 30 min at a time and more than five times per week.
bHealth examination during past 2 years was indicated as ‘yes’ when the subject had undergone health checkup within the prior 2 years.
cCancer examination during past 2 years was indicated as ‘yes’ when the subject had undergone screening within the prior 2 years for any kind of cancer such as lung cancer, stomach cancer, and breast cancer etc.