Table 1 Publication characteristics of the included studies in this meta-analysis
First author (year) | Study design | Study period | Study region | No. of participants | ||
|---|---|---|---|---|---|---|
Total(%) | Late presentation | Non-late presentation | ||||
| Â | Â | Â | Â | 229,695(100.00) | 105,953 | 123,742 |
Xi Hu [18] | Cross-sectional study | 2012–2016 | Guangxi Zhuang Autonomous Region | 45,118(19.64) | 31,663 | 13,455 |
Haiyang Hu [19] | Case–control | 2011–2014 | Jiangsu Province | 491(0.21) | 188 | 303 |
Hongbo Jiang [20] | Case–control | 2018–2019 | Guangdong Province | 997(0.43) | 400 | 597 |
Lin Jin [21] | Case–control | 2011–2015 | Anhui province | 7073(3.08) | 2949 | 4124 |
Ji Zeng [22] | Case–control | 2013 | Beijing City | 2770(1.21) | 582 | 2188 |
Yalan Huang [23] | Case–control | 2011–2017 | Quanzhou City, Fujian Province | 2551(1.11) | 901 | 1650 |
Jian Li [24] | Case–control | 2013–2015 | Gansu Province | 1965(0.86) | 524 | 1441 |
Ziming Lin [25] | Case–control | 2010–2016 | Guangdong Province | 47,343(20.61) | 19,624 | 27,719 |
Wenjie Cao [26] | Case–control | 2014–2018 | Guizhou Province | 33,611(14.63) | 10,495 | 23,116 |
Li Liu [27] | Case–control | 2011–2015 | Nanjing City, Jiangsu Province | 3112(1.35) | 963 | 2149 |
Liqiang Xu [28] | Case–control | 2010–2015 | Changshu City, Jiangsu Province | 310(0.13) | 120 | 190 |
Jinwei Li [29] | Case–control | 2010–2015 | Jingjiang City, Jiangsu Province | 102(0.04) | 36 | 66 |
Yao Qi [30] | Case–control | 2011–2014 | Yancheng City, Jiangsu Province | 411(0.18) | 148 | 263 |
Pengfei Bing [31] | Case–control | 2012–2017 | Suzhou City, Jiangsu Province | 3605(1.57) | 829 | 2776 |
Ping Liu [32] | Case–control | 2013–2018 | Zhangjiagang City, Jiangsu Province | 401(0.17) | 117 | 284 |
Lu Ye [33] | Case–control | 2010–2017 | Zhengjiang City, Jiangsu Province | 972(0.42) | 333 | 639 |
Qing Yang [34] | Case–control | 2014–2018 | Jiangxi province | 11,557(5.03) | 5227 | 6330 |
Dan Zhou [35] | Case–control | 2015–2018 | Liaogning Province | 11,043(4.81) | 3148 | 7895 |
Ying Wang [36] | Case–control | 2014–2018 | Heze City, Shandong Province | 728(0.32) | 252 | 476 |
Jianzhuo Li [37] | Case–control | 2011–2016 | Jinan City, Shandong Province | 1365(0.59) | 273 | 1092 |
Li Li [38] | Case–control | 2012–2017 | Linyi City, Shandong Province | 887(0.39) | 465 | 422 |
Hongmei Liang [39] | Case–control | 2011–2016 | Shanxi Province | 5213(2.27) | 1885 | 3328 |
Hailan Zhang [40] | Case–control | 2011–2017 | Xi’an City, Shaanxi Province | 7427(3.23) | 2088 | 5339 |
Zairan Duan [41] | Case–control | 2012–2016 | Hejiang County, Sichuan Province | 693(0.30) | 282 | 411 |
Yan Guo [42] | Case–control | 2011–2015 | Tianjin City | 2922(1.27) | 916 | 2006 |
Lirong Liu [43] | Case–control | 2011–2015 | Yining City, Xinjiang Uygur Autonomous Region | 2449(1.07) | 500 | 1949 |
Shunzhu Yin [44] | Case–control | 2012–2018 | Dali Bai Autonomous Prefecture, Yunnan Province | 4648(2.02) | 1467 | 3181 |
Lin Li [45] | Case–control | 2015 | Dehong Prefecture, Yunnan Province | 942(0.41) | 526 | 416 |
Zuokai Yang [46] | Case–control | 2015–2017 | Shaoxing City, Zhejiang Province | 776(0.34) | 202 | 574 |
Xiaohong Pan [47] | Case–control | 2012 | Zhejiang Province | 1894(0.82) | 500 | 1394 |
Yong Zhu [48] | Case–control | 2012–2017 | Rongchang District, Chongqing City | 931(0.41) | 442 | 489 |
Conghui Xu [49] | Case–control | 2016 | Shapingba District, Yubei District, Jiangjin district and Hechuan District of Chongqing City | 1035(0.45) | 349 | 686 |
Zhongrong Yang [50] | Case–control | 2015–2017 | Huzhou city, Zhejiang Province | 757(0.33) | 581 | 176 |
Qi Sun [51] | Case–control | 2013–2019 | Weihai City,Shandong Province | 807(0.35) | 526 | 281 |
Jie Ding [52] | Case–control | 2010–2018 | Wuhan City,Hubei Province | 7783(3.39) | 4815 | 2968 |
Jin Chen [53] | Case–control | 2019 | Xinjiang Uygur Autonomous Region | 5489(2.39) | 4723 | 766 |
Jiaxiang Chen [54] | Case–control | 2010–2019 | Jimei District, Xiamen City, Fujian Province | 527(0.23) | 368 | 159 |
Chenquan Qiu [55] | Case–control | 2014–2019 | Qujing City,Yunnan Province | 7242(3.15) | 5295 | 1947 |
Chunling Huang [56] | Case–control | 2019 | Suining City, Sichuan Province | 1748(0.76) | 1251 | 497 |