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Table 1 Sample characteristics at birth by childhood overweight/obesity status

From: Are environmental area characteristics at birth associated with overweight and obesity in school-aged children? Findings from the SLOPE (Studying Lifecourse Obesity PrEdictors) population-based cohort in the south of England

 Age 4–5 years (n = 14,084)Age 10–11 years (n = 5637)Missing (%)
Not overweight or obese, < 85th centileOverweight/obese, ≥ 85th centileNot overweight or obese, < 85th centileOverweight/obese, ≥ 85th centile
Total10,826 (76.9%)3258 (23.1%)3687 (65.4%)1950 (34.6%)0 (0.0%)
Maternal BMI at booking (kg/m2)    63 (0.4%)
 Underweight (< 18.5)429 (4.0%)56 (1.7%)161 (4.4%)36 (1.9%) 
 Normal weight (18.5–24.9)5978 (55.2%)1286 (39.5%)2251 (61.1%)844 (43.3%) 
 Overweight (25.0–29.9)2627 (24.3%)956 (29.3%)828 (22.5%)554 (28.4%) 
 Obese (> 30.0)1792 (16.6%)960 (29.5%)447 (12.1%)516 (26.5%) 
Maternal age mean (SD)27.6 (5.9)27.3 (6.0)27.1 (6.0)27.0 (6.1)0 (0.0%)
Maternal smoking at booking    63 (0.4%)
 Never smoker5324 (49.4%)1393 (42.9%)1785 (48.6%)838 (43.2%) 
 Ex-smoker3288 (30.5%)1004 (30.9%)1064 (29.0%)560 (28.9%) 
 Up to 10 cigarettes per day1291 (12.0%)503 (15.5%)444 (12.1%)287 (14.8%) 
 10–20 cigarettes per day816 (7.6%)314 (9.7%)353 (9.6%)237 (12.2%) 
 > 20 cigarettes per day68 (0.6%)33 (1.0%)25 (0.7%)18 (0.9%) 
Maternal ethnicity    0 (0.0%)
 White8735 (80.7%)2645 (81.2%)2939 (79.7%)1483 (76.1%) 
 Mixed140 (1.3%)58 (1.8%)40 (1.1%)39 (2.0%) 
 Asian1021 (9.4%)284 (8.7%)284 (7.7%)176 (9.0%) 
 Black/African/Caribbean222 (2.1%)95 (2.9%)45 (1.2%)47 (2.4%) 
 Others214 (2.0%)53 (1.6%)70 (1.9%)37 (1.9%) 
 Not known494 (4.6%)123 (3.8%)309 (8.4%)168 (8.6%) 
Maternal highest education at booking    25 (0.2%)
 University2301 (21.3%)518 (15.9%)647 (17.6%)232 (11.9%) 
 College4350 (40.2%)1348 (41.4%)1366 (37.1%)752 (38.6%) 
 Up to secondary school4162 (38.5%)1388 (42.7%)1667 (45.3%)962 (49.4%) 
Maternal employment at booking    165 (1.0%)
 Unemployed4110 (38.4%)1343 (41.6%)1446 (39.6%)832 (43.1%) 
Maternal parity at booking    0 (0.0%)
 No previous live births4815 (44.5%)1329 (40.8%)1662 (45.1%)815 (41.8%) 
 One previous live birth3693 (34.1%)1112 (34.1%)1230 (33.4%)645 (33.1%) 
 Two previous live births1459 (13.5%)496 (15.2%)512 (13.9%)295 (15.1%) 
 Three or more previous live births859 (7.9%)321 (9.9%)283 (7.7%)195 (10.0%) 
Birthweight centile mean (SD)47 (29.1)56 (29.3)47 (29.4)52 (29.8) 
 Did not change home LSOA8717 (77.1%)2109 (76.1%)1771 (48.0%)901 (46.2%)0 (0.0%)
 Changed home LSOA2595 (22.9%)663 (23.9%)1916 (52.0%)1049 (53.8%) 
Area measures
 Greenspace % LSOA (SD)26.0 (19.0)26.2 (19.1)27.8 (19.9)26.3 (18.7)0 (0.0%)
 Greenspace % MSOA (SD)29.0 (17.7)28.7 (17.3)30.8 (18.6)28.7 (17.5)0 (0.0%)
 Walkability LSOA (SD)1.7 (2.8)1.8 (2.7)1.5 (2.8)1.7 (2.7)0 (0.0%)
 Walkability MSOA (SD)2.8 (2.7)2.9 (2.7)2.7 (2.8)2.9 (2.6)0 (0.0%)
 Supermarket density LSOA (SD)1.0 (0.9)1.0 (1.0)1.0 (0.9)0.9 (0.9)0 (0.0%)
 Supermarket density MSOA (SD)0.9 (0.7)0.9 (0.7)0.9 (0.7)0.9 (0.7)0 (0.0%)
 Unhealthy food index LSOA (SD)6.2 (6.4)6.3 (6.5)4.2 (3.6)4.4 (3.6)0 (0.0%)
 Unhealthy food index MSOA (SD)5.4 (4.4)5.4 (4.4)3.8 (2.4)4.0 (2.4)0 (0.0%)
 Spaces for social interaction LSOA (SD)7.3 (5.2)7.5 (5.1)6.8 (4.8)7.1 (4.9)0 (0.0%)
 Spaces for social interaction MSOA (SD)6.6 (3.9)6.8 (3.9)6.2 (3.8)6.6 (3.8)0 (0.0%)
 PM2.5 LSOA (SD)13.2 (1.5)13.1 (1.5)12.8 (1.2)12.8 (1.2)0 (0.0%)
 PM2.5 MSOA (SD)13.1 (1.5)13.1 (1.4)12.8 (1.2)12.8 (1.2)0 (0.0%)
 PM 10 LSOA (SD)18.6 (2.4)18.5 (2.3)19.8 (1.5)19.9 (1.5)0 (0.0%)
 PM10 MSOA (SD)18.6 (2.3)18.5 (2.3)19.7 (1.5)19.8 (1.5)0 (0.0%)
 NOx LSOA (SD)40.2 (12.7)40.2 (12.9)31.8 (6.0)32.1 (6.2)0 (0.0%)
 NOx MSOA (SD)40.2 (12.5)40.0 (12.4)31.4 (5.5)31.6 (5.5)0 (0.0%)
  1. LSOA areas with average populations of 1500 and an area of 4 km2, MSOA areas with average populations of 7000 and an area of 21 km2, SD standard deviation