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Table 2 Demographic, clinical and health care characteristics of induced women by hospital

From: Risk of caesarean section after induced labour: do hospitals make a difference?

Hospital 1 2 3 4 5 p-value
  n = 455 n = 237 n = 369 n = 468 n = 512  
  n (%) or mean ± standard deviation  
Maternal age (years) 29.4 ± 5.86 30.5 ± 5.44 30.3 ± 4.98 29.6 ± 4.81 28.9 ± 5.59 <0.001
Education level (years)       
= < 6 162 (35.6) 68 (28.7) 77 (20.9) 101 (21.6) 147 (28.7) <0.001
7 – 9 114 (25.1) 51 (21.5) 86 (23.3) 97 (20.7) 181 (35.4)
10 – 12 83 (18.2) 49 (20.7) 100 (27.1) 125 (26.7) 103 (20.1)
> 12 92 (20.2) 68 (28.7) 106 (28.7) 143 (30.6) 78 (15.2)
no information (%) 0.9 0.4 0.0 0.4 0.5  
Country of origin       
Native Portuguese 423 (93.0) 227 (95.8) 353 (95.7) 444 (94.9) 483 (94.3) 0.801
European non-Portuguese 7 (1.5) 1 (0.4) 3 (0.8) 6 (1.3) 6 (1.2)
African 4 (0.9) 3 (1.3) 3 (0.8) 4 (0.9) 6 (1.2)
South American 8 (1.8) 2 (1.8) 6 (1.6) 10 (2.1) 8 (1.6)
Other 13 (2.9) 4 (1.7) 4 (1.1) 4 (0.9) 9 (1.8)
Parity and previous caesarean       
Primiparous 275 (60.4) 142 (59.9) 243 (65.9) 316 (67.5) 329 (64.3) 0.142
Multiparous no previous caesarean 137 (30.1) 74 (31.2) 90 (24.4) 105 (22.4) 126 (24.6)
Multiparous previous caesarean 43 (9.5) 21 (8.9) 36 (9.8) 47 (10.1) 57 (11.1)
Body mass index (Kg/m 2 )       
<25.0 195 (42.9) 147 (62.0) 263 (71.3) 304 (65.0) 306 (59.8) 0.010
25.0 – 29.9 90 (19.8) 58 (24.5) 65 (17.6) 101 (21.6) 130 (25.4)
> = 30 44 (9.7) 26 (11.0) 28 (7.6) 48 (10.3) 53 (10.4)
no information (%) 27.7 2.5 3.5 3.2 4.5  
Antenatal care       
Only public services 328 (72.1) 146 (61.6) 184 (49.9) 209 (44.7) 321 (62.7) <0.001
At least one visit at private services 121 (26.6) 74 (31.2) 183 (49.6) 255 (54.5) 137 (26.8)
no information (%) 1.3 7.2 0.5 0.9 10.5  
Indications for induction*       
None 133 (29.2) 48 (20.3) 154 (41.7) 198 (42.3) 233 (45.5) <0.001
One 199 (43.7) 124 (52.3) 161 (43.6) 188 (40.2) 185 (36.2)
Two or more 120 (26.4) 59 (24.9) 49 (13.3) 74 (15.8) 83 (16.2)
no information (%) 0.7 2.5 1.4 1.7 2.1  
Foetal presentation       
Cephalic 439 (96.5) 225 (94.9) 351 (95.1) 463 (98.9) 499 (97.5) 0.002
Non-cephalic 6 (1.3) 7 (3.0) 16 (4.3) 4 (0.9) 7 (1.4)
no information (%) 2.2 2.1 0.5 0.2 1.2  
Gestational age (weeks)       <0.001
<37 9 (2.0) 9 (3.8) 26 (7.0) 30 (6.4) 13 (2.5)
37 27 (5.9) 14 (5.9) 49 (13.3) 29 (6.2) 23 (4.5)
38 70 (15.4) 36 (15.2) 109 (29.5) 84 (17.9) 46 (9.0)
39 114 (25.1) 54 (22.8) 109 (29.5) 100 (21.4) 94 (18.4)
40 140 (30.8) 48 (20.3) 68 (18.4) 116 (24.8) 300 (58.6)
> = 41 95 (20.9) 76 (32.1) 8 (2.2) 109 (23.3) 36 (7.0)
Epidural       
Yes 352 (77.4) 194 (81.9) 279 (75.6) 355 (75.9) 375 (73.2) 0.043
No 65 (14.3) 20 (8.4) 41 (11.1) 63 (13.5) 82 (16.0)
no information (%) 8.4 9.7 13.3 10.7 10.7  
Mode of delivery       
Caesarean 161 (35.4) 77 (32.5) 150 (40.7) 214 (45.7) 248 (48.4) <0.001
Vaginal 294 (64.6) 160 (67.5) 219 (59.3) 254 (54.3) 264 (51.6)  
  1. * Conditions considered and counted were the usual major indications as explained in the Methods Section.