Table 3 TB Prevalence and comparison of subgroups of the elderly participants aged 65 or over in China in 2013
Category | Number of participants | Bacteriologically confirmed TB cases | Active TB cases | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Number | Prevalence (95% CI) | χ 2 | P value | Crude OR (95% CI) | Number | Prevalence (95% CI) | χ 2 | P value | Crude OR (95% CI) | ||
All | 34 269 | 62 | 180.92 (135.89–225.96) |  |  |  | 193 | 563.19 (483.73–642.65) |  |  |  |
Sex | |||||||||||
 Female | 18 212 | 17 | 93.35 (48.97–137.72) | 16.51 | < 0.0001 | ref | 49 | 269.05 (193.72–344.39) | 60.05 | < 0.0001 | ref |
 Male | 16 057 | 45 | 280.25 (198.37–362.14) | 3.00 (1.72–5.26) | 144 | 896.81 (750.33–1043.28) | 3.35 (2.42–4.64) | ||||
Age(years) | |||||||||||
 65–74 | 21 685 | 22 | 101.45 (59.06–143.85) | 25.76 | < 0.0001 | ref | 93 | 428.87 (341.70–516.03) | 22.58 | < 0.0001 | ref |
 75–84 | 10 658 | 30 | 281.48 (180.75–382.20) | 2.70 (1.56–4.69) | 79 | 741.23 (577.77–904.68) | 1.72 (1.27–2.33) | ||||
 ≥ 85 | 1926 | 10 | 519.21 (197.40–841.02) | 3.93 (1.81–8.55) | 21 | 1090.34 (624.00–1556.69) | 2.12 (1.30–3.44) | ||||
Residence | |||||||||||
 Urban | 12 933 | 14 | 108.25 (51.55–164.96) | 6.07 | 0.0137 | ref | 35 | 270.63 (180.97–360.28) | 31.75 | < 0.0001 | ref |
 Rural | 21 336 | 48 | 224.97 (161.33–288.62) | 2.08 (1.15–3.78) | 158 | 740.53 (625.06–856.00) | 2.75 (1.91–3.97) | ||||
Marital status | |||||||||||
 Married | 24 953 | 43 | 172.32 (120.82–223.83) | 0.51 | 0.7769 | ref | 137 | 549.03 (457.09–640.97) | 0.78 | 0.6777 | ref |
 Single/divorced | 8091 | 17 | 210.11 (110.23–309.99) | 1.21 (0.69–2.12) | 47 | 580.89 (414.82–746.97) | 1.05 (0.75–1.46) | ||||
 Unknown | 1225 | 2 | 163.27 (19.76–589.39) | 0.73 (0.18–3.03) | 9 | 734.69 (336.33–1394.29) | 1.03 (0.53–2.03) | ||||
Education level | |||||||||||
 Unknown | 1249 | 2 | 160.13 (19.38–578.06) | 5.89 | 0.2076 | – | 9 | 720.58 (329.86–1367.49) | 9.64 | 0.0469 | 6.41 (0.81–50.58) |
 Illiterate or semi-illiterate | 12 092 | 28 | 231.56 (145.79–317.33) | – | 76 | 628.51 (487.21–769.82) | 6.84 (0.95–49.16) | ||||
 Elementary school | 12 581 | 24 | 190.76 (114.44–267.09) | – | 77 | 612.03 (475.33–748.74) | 6.99 (0.97–50.21) | ||||
 Secondary school | 7123 | 8 | 112.31 (48.43–221.26) | – | 30 | 421.17 (270.46–571.88) | 4.84 (0.66–35.48) | ||||
 College and above | 1224 | 0 | 0 (0–301.47) | ref | 1 | 81.7 (2.07–455.07) | ref | ||||
Family annul income per capita | |||||||||||
 Higher than average | 10 854 | 10 | 92.13 (35.03–149.24) | 6.93 | 0.0085 | ref | 44 | 405.38 (285.60–525.16) | 7.50 | 0.0062 | ref |
 Lower than average | 23 415 | 52 | 222.08 (161.72–282.44) | 2.41 (1.23–4.75) | 149 | 636.34 (534.17–738.52) | 1.57 (1.12–2.20) | ||||
Family living area per capita | |||||||||||
 Higher than average | 16 434 | 26 | 158.21 (97.40–219.02) | 0.90 | 0.3422 | ref | 77 | 468.54 (363.89–573.2) | 5.05 | 0.0246 | ref |
 Lower than average | 17 835 | 36 | 201.85 (135.91–267.79) | 1.28 (0.77–2.11) | 116 | 650.41 (532.04–768.77) | 1.39 (1.04–1.86) | ||||
Smoking historya | |||||||||||
 Never smoke | 27 493 | 44 | 160.04 (112.75–207.33) | 2.55 | 0.2788 | ref | 130 | 472.85 (391.56–554.13) | 17.30 | 0.0002 | ref |
 Prior smoker | 1663 | 4 | 240.53 (65.54–615.75) | 1.55 (0.56–4.31) | 13 | 781.72 (356.77–1206.67) | 1.71 (0.96–3.02) | ||||
 Current smoker | 5104 | 13 | 254.7 (116.24–393.16) | 1.63 (0.88–3.04) | 47 | 920.85 (657.58–1184.11) | 2.01 (1.44–2.80) | ||||
Drinking historyb | |||||||||||
 Never drink | 27 670 | 49 | 177.09 (127.50–226.67) | 0.32 | 0.8533 | ref | 144 | 520.42 (435.42–605.42) | 3.20 | 0.2017 | ref |
 Prior alcohol user | 1234 | 3 | 243.11 (50.16–710.70) | 1.36 (0.42–4.37) | 9 | 729.34 (333.87–1384.12) | 1.39 (0.71–2.73) | ||||
 Current alcohol user | 5313 | 9 | 169.4 (77.55–321.48) | 0.97 (0.48–1.98) | 37 | 696.41 (472.01–920.8) | 1.36 (0.95–1.96) | ||||
BMI | |||||||||||
 < 18.5 | 3639 | 15 | 412.2 (203.60–620.8) | 15.01 | 0.0005 | 2.07 (1.12–3.82) | 47 | 1291.56 (922.31–1660.82) | 63.49 | <  0.0001 | 1.91 (1.35–2.69) |
 18.5–23.9 | 20 884 | 38 | 181.96 (124.10–239.81) | ref | 130 | 622.49 (515.48–729.49) | ref | ||||
 ≥ 24 | 9746 | 9 | 92.35 (42.27–175.25) | 0.52 (0.25–1.08) | 16 | 164.17 (83.73–244.61) | 0.27 (0.16–0.46) | ||||
Diabetes | |||||||||||
 No | 31 867 | 54 | 169.45 (124.26–214.65) | 3.31 | 0.0688 | ref | 177 | 555.43 (473.61–637.26) | 0.49 | 0.4846 | ref |
 Yes | 2402 | 8 | 333.06 (143.63–656.12) | 1.97 (0.94–4.14) | 16 | 666.11 (339.72–992.51) | 1.20 (0.72–2.01) | ||||
Close contacts | |||||||||||
 No | 34 175 | 62 | 181.42 (136.26–226.58) |  | 1.0000d | ref | 190 | 555.96 (476.91–635.02) |  | 0.0162d | ref |
 Yes | 94 | 0 | 0 (0–3925.53) | 2.89 (0.18–47.03) | 3 | 3191.49 (658.51–9329.79) | 5.90 (1.85–18.79) | ||||
Previous TB cases | |||||||||||
 No | 33 663 | 50 | 148.53 (107.36–189.70) | 110.59 | < 0.0001 | ref | 160 | 475.3 (401.65–548.95) | 262.59 | <  0.0001 | ref |
 Yes | 606 | 12 | 1980.2 (859.80–3100.60) | 13.58 (7.20–25.63) | 33 | 5445.54 (3587.57–7303.52) | 12.06 (8.22–17.70) | ||||
Chronic bronchitisc | |||||||||||
 No | 32 521 | 58 | 178.35 (132.45–224.25) |  | 0.7694d | ref | 175 | 538.11 (458.39–617.84) | 3.94 | 0.0473 | ref |
 Yes | 1647 | 3 | 182.15 (37.58–532.48) | 0.98 (0.31–3.13) | 15 | 910.75 (449.85–1371.65) | 0.59 (0.35–1.00) | ||||