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Table 1 Univariate descriptive statistics of all maternity hospitals/units in Ireland (large, mid-sized, small)a and tests of variance, 2008–17

From: The impact of revised diagnostic criteria on hospital trends in gestational diabetes mellitus rates in a high income country

  Median Mean S.D. 95% CI   Min Max F(Sig.) Welch
All hospitals
(n = 19)
Total GDM 2008 45.0 116.6 159.0 40.0- 193.2 5 527 2.222* .021
2009 51.0 137.4 175.4 52.9- 221.9 16 598
2010 60.0 160.2 216.1 56.0- 264.3 2 738
2011 71.0 203.3 261.8 77.1- 329.5 9 894
2012 110.0 255.8 311.7 105.6- 406.0 5 1267
2013 166.0 271.5 268.0 142.3- 400.7 8 926
2014 172.0 347.0 436.3 136.7- 557.3 8 1773
2015 227.0 381.0 462.1 158.3- 603.7 16 1983
2016 267.0 443.0 546.0 179.8- 706.2 19 2319
2017 251.0 473.6 592.5 188.0- 759.1 19 2479
Total 568.0 278.9 384.0 224.0- 333.9 2 2479
CS and GDM 2008 11.0 25.8 29.7 11.6- 40.1 0 98 3.708*** .000
2009 17.0 31.3 31.0 16.3- 46.2 3 111
2010 22.0 34.6 36.6 17.0- 52.2 1 130
2011 22.0 47.9 51.6 23.0- 72.8 1 181
2012 29.0 58.5 61.4 28.9- 88.1 1 245
2013 44.0 66.7 62.2 36.7- 96.7 2 234
2014 50.0 77.7 75.4 41.4- 114.1 3 283
2015 58.0 84.3 73.7 48.8- 119.8 2 258
2016 63.0 103.2 92.9 58.4- 147.9 3 339
2017 57.0 107.8 104.3 57.6- 158.1 3 359
Total 140.0 63.8 70.6 53.7- 73.9 0 359
IOL and GDM 2008 10.0 20.7 26.4 8.0- 33.5 0 84 4.007*** .000
2009 10.0 28.1 33.2 12.1- 44.1 3 106
2010 18.0 34.1 38.5 15.5- 52.6 1 134
2011 25.0 45.4 50.8 20.9- 69.9 0 176
2012 36.0 58.3 64.8 27.0- 89.5 0 242
2013 42.0 66.3 72.9 31.2- 101.5 2 278
2014 51.0 79.9 78.8 42.0- 117.9 0 248
2015 56.0 84.6 71.5 50.1- 119.0 4 248
2016 73.0 102.9 93.6 57.9- 148.1 3 311
2017 64.0 110.8 105.1 60.2- 161.5 2 402
Total 135.5 63.1 72.9 52.7- 73.6 0 402
Large hospitals (n = 4) Total GDM 2008 389.0 370.0 181.0 82.1- 658.0 527 175 1.552 (ns) .366
2009 433.0 424.3 172.2 150.2 698.3 598 233
2010 505.5 505.3 258.6 83.8- 916.7 738 272
2011 603.0 600.3 326.3 81.0- 1119.5 894 301
2012 583.5 694.5 432.9 5.6- 1383.3 1267 344
2013 698.0 659.5 310.7 165.1- 1153.9 926 316
2014 836.0 949.3 660.8 1773 352
2015 823.0 1019.0 706.1 1983 447
2016 1024.5 1225.0 798.7 2319 532
2017 1094.5 1317.8 873.6 2479 603
Total 568.0 776.5 567.4 595.0- 958.0 2479 175
CS and GDM 2008 77.0 70.5 29.9 22.9- 118.1 98 30 4.481* .016
2009 82.0 82.3 24.1 43.9- 120.6 111 53
2010 96.5 91.5 39.0 29.4- 153.6 130 43
2011 125.0 121.0 58.6 27.7- 214.3 181 53
2012 117.5 140.5 72.2 25.5- 255.5 245 82
2013 161.0 158.5 64.3 56.2- 260.8 234 78
2014 198.0 191.3 84.4 56.9- 325.6 283 86
2015 203.0 198.8 68.2 90.2- 307.3 258 131
2016 241.5 248.8 81.1 119.8- 377.7 339 173
2017 275.0 271.8 94.5 121.4- 422.1 359 178
Total 140.0 157.5 88.1 129.3- 185.7 359 30
IOL and GDM 2008 70.0 66.3 21.0 32.9- 99.6 84 41 4.776** .004
2009 88.0 82.8 25.67 41.9- 123.6 106 49
2010 104.0 96.0 38.68 34.5- 157.6 134 42
2011 122.5 119.8 49.71 40.7- 198.9 176 58
2012 124.5 136.8 80.0 9.5- 264.0 242 56
2013 162.5 161.3 101.1 0.4- 322.1 278 42
2014 240.5 203.8 78.8 78.3- 329.2 248 86
2015 212.5 198.5 54.7 111.5- 285.5 248 121
2016 274.5 257.3 67.1 150.4- 364.1 311 169
2017 276.0 280.3 97.9 124.5- 436.0 402 167
Total 135.5 160.3 91.7 130.9- 189.6 402 41
Mid-sized units (n = 5) Total GDM 2008 73.0 94.0 59.3 20.3- 167.7 194 43 6.180** .001
2009 113.0 112.8 79.2 14.4- 211.2 238 37
2010 121.0 124.6 45.0 68.8- 180.4 185 60
2011 155.0 178.2 121.7 27.1- 329.3 378 65
2012 231.0 261.6 147.6 78.3- 444.9 494 100
2013 293.0 314.4 117.2 168.9- 459.9 473 166
2014 315.0 321.4 127.0 163.7- 479.1 476 128
2015 392.0 352.6 123.4 209.3- 515.9 487 175
2016 434.0 400.8 129.5 240.0- 561.6 503 176
2017 510.0 440.0 137.5 269.2- 610.8 519 197
Total 214.0 261.0 158.8 215.9- 306.2 519 37
CS and GDM 2008 16.0 19.4 19.4 −4.6- 43.4 51 2 4.590** .003
2009 36.0 30.2 15.7 10.7- 49.7 46 7
2010 37.0 34.2 15.1 15.5- 52.9 48 10
2011 43.0 54.4 34.5 11.5- 97.3 105 20
2012 40.0 68.8 49.3 7.6- 130.0 140 24
2013 62.0 77.0 31.5 37.9- 116.1 127 53
2014 76.0 80.2 36.1 35.4- 125.0 134 35
2015 80.0 90.2 35.2 46.5- 133.9 146 58
2016 113.0 110.8 44.6 55.4- 166.2 154 48
2017 135.0 116.8 46.7 58.8- 174.8 173 53
Total 53.5 68.2 44.9 55.4- 81.0 173 2
IOL and GDM 2008 12.0 13.0 9.1 1.8- 24.2 24 2 5.213*** .000
2009 31.0 27.4 16.9 6.5- 48.3 47 10
2010 28.0 32.0 13.2 15.6- 48.4 50 16
2011 27.0 44.6 40.5 −5.7- 94.9 117 24
2012 43.0 73.2 59.8 −1.1- 147.5 179 41
2013 67.0 77.8 44.0 23.2- 132.4 153 45
2014 72.0 77.8 37.3 31.5- 124.2 142 51
2015 91.0 89.6 31.5 50.5- 128.7 138 53
2016 94.0 107.0 30.5 69.2- 144.8 153 78
2017 111.0 115.0 24.2 84.9- 145.1 139 80
Total 51.5 65.7 45.4 52.9- 78.6 179 2
Small units (n = 10) Total GDM 2008 28.0 26.5 15.4 15.5- 37.5 50 5 6.521*** .000
2009 31.5 35.0 16.6 23.2- 46.9 64 16
2010 42.0 39.9 21.8 24.3- 55.5 85 2
2011 57.0 57.1 29.9 35.7- 78.5 125 9
2012 75.5 77.4 34.5 52.7- 102.1 134 5
2013 82.0 94.8 52.5 57.3- 132.3 169 8
2014 89.5 118.9 92.4 52.8- 185.0 350 8
2015 126.0 135.0 75.5 81.0- 189.0 269 16
2016 134.5 151.3 94.4 83.8- 218.8 337 19
2017 156.5 152.7 86.3 91.0- 214.4 311 19
Total 67.0 88.9 74.0 74.2- 103.5 350 2
CS and GDM 2008 8.5 11.2 12.1 2.5- 19.9 43 0 7.146*** .000
2009 11.5 11.4 4.8 7.9- 14.8 18 3
2010 10.0 12.0 7.7 6.5- 17.5 22 1
2011 19.0 15.4 8.6 9.2- 21.6 27 1
2012 22.0 20.6 8.5 14.5- 26.7 30 1
2013 23.0 24.8 12.9 15.6- 34.0 44 2
2014 30.5 31.1 16.7 19.1- 43.1 56 3
2015 39.5 35.5 16.1 24.0- 47.0 61 2
2016 41.5 41.1 21.4 25.8- 56.4 80 3
2017 38.5 37.8 18.8 24.3- 51.3 68 3
Total 21.0 24.1 17.2 20.7- 27.5 80 0
IOL and GDM 2008 5.0 6.4 5.5 2.5- 10.3 18 0 7.983*** .000
2009 5.5 6.6 3.7 3.9- 9.3 12 3
2010 9.5 10.3 7.3 5.1- 15.6 25 1
2011 14.5 16.0 13.9 6.0- 26.0 45 0
2012 19.5 19.4 11.4 11.3- 27.5 36 0
2013 21.0 22.6 12.8 13.4- 31.8 48 2
2014 28.0 31.5 17.4 19.1- 43.9 65 0
2015 30.5 36.5 20.7 21.7- 51.3 71 4
2016 38.0 39.2 22.1 23.4- 55.0 73 3
2017 46.5 41.0 20.8 26.1- 55.9 64 2
Total 18.5 23.0 19.1 19.2- 26.78 73 0
  1. aLarge hospitals: > 7000 deliveries per annum; Mid-sized hospitals/units: 2000–6000 deliveries p.a., Small units: < 2000 deliveries p.a. (based on numbers of deliveries in 2017)