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. 2016 Feb 3;11(2):e0148138. doi: 10.1371/journal.pone.0148138

Table 8. Trends in indications for caesarean section in the relevant categories of women in the Robson classification in Peru, 2000–2010.

Robson Group 2000–2004 2005–2007 2008–2010
  Acute fetal distress Pre-eclampsia Cephalopelvic disproportion Acute fetal distress Pre-eclampsia Cephalopelvic disproportion Acute fetal distress Pre-eclampsia Cephalopelvic disproportion
  n (%) n (%) n (%) n (%) n (%) n (%) n (%) n (%) n (%)
1 1,810 (20.7)* 609 (6.97)* 2,657 (31.2)a 2,036 (21.4) 667 (7.01) 2,523 (27.4) 2,120 (22.9) 512 (5.54) 2,512 (29.0)
2a 202 (20.3) 129 (12.9)a 191 (19.3) 155 (15.4) 87 (8.64) 147 (14.6) 136 (20.1) 44 (6.52) 94 (14.0)
2b 1,508 (17.8)b 1,026 (12.2)* 2,087 (25.0)* 1,370 (16.1) 1,021 (12.0) 2,243 (26.7) 1,300 (16.6) 743 (9.50) 2,243 (29.1)
3 801 (22.2) 217 (6.01) 640 (18.0)* 910 (23.1) 266 (6.75) 671 (17.6) 850 (22.8) 211 (5.65) 732 (21.2)
4a 87 (28.5) 24 (7.87) 46 (15.8) 60 (20.7) 16 (5.52) 37 (12.8) 71 (25.7) 10 (3.62) 23 (8.39)
4b 789 (16.6) 491 (10.3) 520 (10.9)a 792 (15.2) 537 (10.3) 836 (16.1) 558 (14.7) 365 (9.60) 620 (16.5)
5 450 (4.53)c 317 (3.19) 1,397 (14.0)a 387 (3.94) 296 (3.01) 1,091 (11.2) 347 (3.67) 289 (3.06) 1,106 (12.1)
6 45 (1.38) 78 (2.39) 49 (1.51) 30 (1.09) 55 (2.01) 40 (1.48) 30 (1.41) 40 (1.87) 41 (1.97)
7 74 (2.82)* 76 (2.89) 65 (2.48)b 64 (2.41) 51 (1.92) 39 (1.49) 27 (1.20) 48 (2.13) 43 (1.96)
8 55 (2.47) 190 (8.54) 24 (1.13) 62 (3.01) 154 (7.49) 9 (0.45) 28 (1.75) 116 (7.23) 8 (0.54)
9 59 (2.98) 49 (2.47) 45 (2.28) 48 (2.58) 31 (1.67) 31 (1.69) 28 (1.91) 33 (2.25) 40 (2.85)
10 498 (10.3) 1,199 (24.7) 239 (5.03)d 509 (9.86) 1,279 (24.7) 181 (3.61) 481 (10.7) 1,045 (23.3) 198 (4.81)

Time trend

* p<0.01 2000–2004 vs2008–2010; 2005–2007 vs2008–2010

a: p<0.01:2000–2004 vs2005–2007;2000–2004 vs2008–2010.

b:2000–2004 vs2005–2007

c: p<0.01 2000–2004 vs 2008–2010

d: p<0.001: 2000–2004 vs 2005–2007; 2005–2007 vs 2008–2010