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Table 5 Rates of international collaboration (%) in the top 15 most productive countries and by world region, pneumonia research output (2001–2015)

From: A snapshot of pneumonia research activity and collaboration patterns (2001–2015): a global bibliometric analysis

  Total 2001–2005 2006–2010 2011–2015
N docs N docs Int col % N docs N docs Int col % N docs N docs Int col % N docs N docs Int col %
Country
 USA 8735 2300 26.33 2248 427 18.99 2907 761 26.18 3580 1112 31.06
 UK 1629 811 49.82 403 156 38.71 512 241 47.07 714 414 57.98
 Japan 1581 285 18.03 338 58 17.16 518 94 18.15 725 133 18.34
 Germany 1544 626 40.54 388 113 29.12 521 186 35.70 635 327 51.50
 France 1527 513 33.59 417 98 23.50 497 155 31.19 613 260 42.41
 Spain 1251 422 33.73 297 61 20.54 423 124 29.31 531 237 44.63
 Peoples R. China 1126 320 28.42 62 21 33.87 237 91 38.40 827 208 25.15
 Canada 1091 503 46.10 290 112 38.62 361 145 40.17 440 246 55.91
 Netherlands 911 414 45.44 205 69 33.66 279 127 45.52 427 218 51.05
 Italy 859 345 40.16 160 43 26.88 298 115 38.59 401 187 46.63
 Australia 734 355 48.37 150 65 43.33 225 111 49.33 359 179 49.86
 Brazil 600 216 36 74 30 40.54 213 75 35.21 313 111 35.46
 Switzerland 541 337 62.29 128 62 48.44 190 123 64.74 223 152 68.16
 South Korea 534 105 19.66 71 19 26.76 148 32 21.62 315 54 17.14
 Taiwan 509 83 16.31 64 11 17.19 149 23 15.44 296 49 16.55
Total international collaboration 22,593 4248 18.80 5442 781 14.35 7373 1351 18.32 9778 2116 21.64
Geographic area
 North America 9549 1276 13.36 2469 216 8.75 3187 407 12.77 3893 653 16.77
 Europe & Central Asia 9256 1033 11.16 2359 167 7.08 3110 341 10.96 3787 525 13.86
 East Asia & Pacific 4742 610 12.86 743 100 13.46 1374 209 15.21 2625 301 11.47
 Latin America & Caribbean 1099 249 22.66 174 45 25.86 366 68 18.58 559 136 24.33
 Middle East & North Africa 590 110 18.64 115 14 12.17 178 28 15.73 297 68 22.90
Sub-Saharan Africa 523 241 46.08 121 43 35.54 151 67 44.37 251 131 52.19
 South Asia 461 108 23.43 56 10 17.86 160 33 20.63 245 65 26.53
Total world region collaboration 22,593 3109 13.76 5442 536 9.85 7373 1007 13.66 9778 1566 16.02