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Table 1 Characteristics of the one-year-old participants. The 2015 Pelotas Birth Cohort, Brazil

From: Objectively measured physical activity in one-year-old children from a Brazilian cohort: levels, patterns and determinants

CharacteristicsAccelerometry data*No accelerometry data** 
 n (%)n (%)p-value (x2 test)
Sex  0.008
 Female1424 (47.9)550 (52.7) 
 Male1550 (52.1)494 (47.3) 
Low birthweight  0.109
 Yes267 (9.0)111 (10.7) 
 No2707 (91.0)930 (89.3) 
Preterm birth  0.490
 Yes442 (14.9)146 (14.0) 
 No2532 (85.1)898 (86.0) 
Maternal age (years)  0.065
  < 20446 (15.0)139 (13.3) 
 20–291425 (47.9)470 (45.0) 
 30–391020 (34.3)401 (38.4) 
  ≥ 4082 (2.8)34 (3.3) 
Assets index (quintiles)   
 1 (poorest)590 (20.5)171 (17.0)< 0.001
 2606 (21.1)177 (17.6) 
 3599 (20.8)188 (18.7) 
 4573 (19.9)209 (20.7) 
 5 (richest)507 (17.6)263 (26.1) 
Overall2974 (100)1044 (100) 
  1. *Number of observations vary due to missing values
  2. **Participants with no accelerometry valid data
  3. ǂ Includes 59 deaths