Table 2.
Individual baseline characteristics for the entire cohort and stratified by greenbelt exposure
| Number (%) | NDVI, n (%) | NDVI_250m, n (%) | NDVI_500m, n (%) | |||||
|---|---|---|---|---|---|---|---|---|
| Low exposure a | High exposure b | Low exposure a | High exposure b | Low exposure a | High exposure b | p Value | ||
| TB case | ||||||||
| Total | 29,519 (100) | 14,778 (49.9) | 14,741 (50.1) | 14,769 (50.0) | 14,750 (50.0) | 14,763 (50.0) | 14,756 (50.0) | |
| Stratified by sex | 0.062 | |||||||
| Male | 20,937 (70.9) | 10,190 (68.9) | 10,747 (72.9) | 10,167 (68.8) | 10,770 (73.0) | 10,184 (69.0) | 10,753 (72.9) | |
| Female | 8582 (29.1) | 4588 (31.1) | 3994 (27.1) | 4602 (31.2) | 3980 (27.0) | 4579 (31.0) | 4003 (27.1) | |
| Stratified by age | 0.150 | |||||||
| 0–64 years | 21,311 (72.2) | 11,609 (78.6) | 9702 (65.8) | 11,628 (78.7) | 9683 (65.6) | 11,636 (78.8) | 9675 (65.6) | |
| ≥ 65 years | 8280 (27.8) | 3169 (21.4) | 5037 (34.2) | 3141 (21.3) | 5067 (34.4) | 3127 (21.2) | 5081 (34.4) | |
| Stratified by working environment | 0.000 | |||||||
| Indoor | 17,872 (60.5) | 6265 (42.3) | 11,607 (78.7) | 6215 (42.1) | 11,657 (79.0) | 6171 (41.8) | 11,701 (79.3) | |
| Outdoor | 11,647 (39.5) | 8513 (57.7) | 3134 (21.3) | 8554 (57.9) | 3093 (21.0) | 8592 (58.2) | 3055 (20.7) | |
| Stratified by occupation | 0.000 | |||||||
| Intelligent-intensive | 5214 (17.7) | 3663 (24.7) | 1551 (10.5) | 3669 (24.8) | 1545 (10.5) | 3679 (24.9) | 1535 (10.4) | |
| Labor-intensive | 24,305 (82.3) | 11,115 (75.3) | 13,910 (89.5) | 11,100 (75.2) | 13,205 (89.5) | 11,084 (75.1) | 13,221 (89.6) | |
| Stratified by region | 0.000 | |||||||
| Urban | 9211 (31.2) | 8039 (54.3) | 1172 (8.0) | 8095 (54.8) | 1116 (7.6) | 8234 (55.8) | 977 (6.6) | |
| Rural | 20,308 (68.8) | 6739 (45.7) | 13,569 (92.0) | 6674 (45.2) | 13,634 (92.4) | 6529 (44.2) | 13,779 (93.4) | |
| Stratified by city | 0.479 | |||||||
| Hefei | 18,087 (61.3) | 10,186 (68.9) | 7901 (53.6) | 10,296 (69.7) | 7791 (52.8) | 10,337 (70.0) | 7750 (52.5) | |
| Huainan | 8288 (28.1) | 3880 (26.2) | 4408 (29.9) | 3882 (26.3) | 4406 (29.9) | 3853 (26.1) | 4435 (30.1) | |
| Huangshan | 3144 (10.7) | 712 (4.9) | 2432 (16.5) | 591 (4.0) | 2553 (17.3) | 573 (3.9) | 2571 (17.4) | |
| Detainee c | 0.177 | |||||||
| Yes | 426 (1.4) | 221 (1.4) | 205 (1.4) | 236 (1.6) | 190 (1.3) | 233 (1.6) | 193 (1.3) | |
| No | 29,093 (98.6) | 14,557 (98.6) | 14,536 (98.6) | 14,533 (98.4) | 14,560 (98.7) | 14,530 (98.4) | 14,563 (98.7) | |
| Source of TB | 0.000 | |||||||
| Health check or contact check | 305 (1.0) | 193 (1.3) | 112 (0.8) | 189 (1.3) | 116 (0.8) | 195 (1.3) | 110 (0.7) | |
| Clinical consultation | 4260 (14.4) | 1816 (12.2) | 2444 (16.6) | 1836 (12.4) | 2424 (16.4) | 1826 (12.4) | 2434 (16.5) | |
| Transfer treatment | 24,954 (84.5) | 12,769 (96.5) | 12,185 (82.6) | 12,744 (86.3) | 12,210 (82.8) | 12,742 (86.3) | 12,212 (82.8) | |
| Diagnostic classification | 0.000 | |||||||
| I | 5 (0.0) | 2 (0.0) | 3 (0.0) | 2 (0.0) | 3 (0.0) | 2 (0.0) | 3 (0.0) | |
| II | 146 (0.5) | 67 (0.5) | 79 (0.5) | 65 (0.4) | 81 (0.5) | 67 (0.5) | 79 (0.5) | |
| III | 27,253 (92.3) | 13,692 (92.6) | 13,564 (92.1) | 13,684 (92.7) | 13,569 (92.0) | 13,696 (92.8) | 13,557 (91.9) | |
| IV | 1795 (6.1) | 890 (6.0) | 905 (6.1) | 885 (6.0) | 910 (6.2) | 877 (5.9) | 918 (6.2) | |
| V | 320 (1.1) | 127 (0.9) | 193 (1.3) | 133 (0.9) | 187 (1.3) | 121 (0.8) | 199 (1.3) | |
| Sever case | 0.007 | |||||||
| Yes | 540 (1.8) | 375 (1.5) | 165 (1.1) | 372 (2.5) | 168 (1.1) | 380 (2.6) | 160 (1.1) | |
| No | 28,979 (98.2) | 14,403 (98.5) | 14,576 (98.9) | 14,397 (97.5) | 14,582 (98.9) | 14,383 (97.4) | 14,596 (98.9) | |
| Treatment management style c | 0.004 | |||||||
| The entire supervision | 20,450 (69.3) | 11,457 (77.5) | 9000 (61.1) | 11,474 (77.7) | 8983 (60.9) | 11,531 (78.1) | 8926 (60.5) | |
| Intensive supervision | 8965 (30.4) | 3292 (22.3) | 5673 (38.5) | 3273 (22.2) | 5692 (38.6) | 3206 (21.7) | 5759 (39.0) | |
| Self-administrative treatment | 97 (0.3) | 29 (0.2) | 68 (0.4) | 22 (0.1) | 75 (0.5) | 26 (0.2) | 71 (0.5) | |
aLow exposure is defined as from the minimum to the median
bHigh exposure is defined as from the median to maximum
cTreatment management style: In order to ensure that patients can adhere to regular medication and complete the prescribed course of treatment, effective management measures must be taken to ensure that patients can complete the course of treatment
NDVI, normalized difference vegetation index; NDVI_250m, normalized difference vegetation index in the 250-m buffer; NDVI_500m, normalized difference vegetation index in the 500-m buffer