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Table 1 Characteristics of the mothers in 2004 and 2015 Birth Cohort Studies. Pelotas, Brazil

From: Changes in leisure-time physical activity among Brazilian pregnant women: comparison between two birth cohort studies (2004 – 2015)

Variables 2004
(n = 4244)
2015
(n = 4129)
  N % (95%CI) N % (95%CI)
Age (years) n = 4242   n = 4128  
 12 –19 848 19.0 (17.9 –20.2) 620 15.0 (14.0 –16.1)
 20 –29 2224 49.8 (48.2 –51.2) 1950 47.3 (45.7 –48.8)
 30 –39 1251 28.0 (26.7 –29.3) 1434 34.7 (33.3 –36.2)
 40 –47 146 3.2 (2.8 –3.9) 124 3.0 (2.5 –3.6)
Skin Color n = 4192   n = 4122  
 White 2581 61.6 (60.1 –63.0) 2895 70.2 (68.8 –71.6)
 Non-white 1611 38.4 (37.0 –39.9) 1227 29.8 (28.4 –31.2)
Schooling (years) n = 4202   n = 4127  
 0 –4 658 15.7 (14.6 –16.8) 390 9.5 (8.6 –10.4)
 5 –8 1740 41.4 (39.9 –42.9) 1082 26.2 (24.9 –27.6)
 9 –11 1385 33.0 (31.5 –34.4) 1415 34.3 (32.9 –35.7)
  > =12 419 9.9 (9.1 –10.9) 1240 30.0 (28.7 –31.5)
Marital status n = 4244   n = 4128  
 Living with a partner 3542 83.5 (82.3 –84.5) 3524 85.4 (84.3 –86.4)
 Living without a partner 702 16.5 (15.5 –17.7) 604 14.6 (13.6 –15.7)
Employement during pregnancy n = 4243   n = 4128  
 Yes 1700 40.1 (38.6 –41.5) 2270 55.0 (53.5 –56.5)
 No 2543 59.9 (58.5 –61.4) 1858 45.0 (43.5 –46.5)
Pre-pregnancy BMI (Kg/m2) n = 2887   n = 4005  
  < 18.5 213 7.4 (6.5 –8.4) 155 3.9 (3.3 –4.5)
 18.5 –24.9 1836 63.6 (61.8 –65.3) 1928 48.1 (46.6 –49.7)
 25.0 –29.9 581 20.1 (18.7 –21.6) 1096 27.4 (26.0 –28.8)
  > =30 257 8.9 (7.9 –10.0) 826 20.6 (19.4 –21.9)
Parity n = 4243   n = 4127  
 1 (primiparae) 1673 39.4 (38.0 –40.9) 2047 49.6 (48.1 –51.1)
 2 1105 26.1 (24.7 –27.4) 1274 30.9 (29.5 –32.3)
 3 or more 1465 34.5 (33.1 –36.0) 806 19.5 (18.3 –20.8)
Smoking during pregnancya n = 4244   n = 4126  
 Yes 1172 27.6 (26.3 –29.0) 701 17.0 (15.9 –18.2)
 No 3072 72.4 (71.0 –73.7) 3425 83.0 (81.8 –84.1)
Gestational diabetes mellitusb n = 4241   n = 4125  
 Yes 126 3.0 (2.5 –3.5) 353 8.6 (7.7 –9.5)
 No 4115 97.0 (96.5 –97.5) 3772 91.4 (90.5 –92.3)
Gestational hypertensionb n = 4236   n = 4126  
 Yes 1006 23.7 (22.5 –25.1) 1055 25.6 (24.3 –26.9)
 No 3230 76.3 (74.9 –77.5) 3071 74.4 (73.1 –75.7)
Physical activity counselling during prenatal care n = 4155   n = 4029  
 Yes 2999 72.2 (70.8 –73.5) 2471 61.3 (59.8 –62.8)
 No 1156 27.8 (26.5 –29.2) 1558 38.7 (37.2 –40.2)
  1. aSmoking during all trimester of pregnancy
  2. bSelf-reported gestational diabetes mellitus and hypertension