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Table 3 Distribution of prevalence of thinness by sibship size or structure

From: Association of number of siblings, birth order, and thinness in 3- to 12-year-old children: a population-based cross-sectional study in Shanghai, China

Variables Total sample Grade 1 thinness Grade 2 thinness Grade 3 thinness Total thinness
N N % N % N % N %
Number of siblings
 None (only child) 49,097 4884 9.95 1469 2.99 993 2.02 7346 14.96
 One 6852 784 11.44 258 3.77 204 2.98 1246 18.18
 Two or more 11,625 1128 9.70 423 3.64 478 4.11 2029 17.45
 Total 67,574 6796 10.06 2150 3.18 1675 2.48 10,621 15.72
Birth order
 Only child 49,097 4884 9.95 1469 2.99 993 2.02 7346 14.96
 Oldest child 7941 855 10.77 285 3.59 268 3.37 1408 17.73
 Middle 6696 638 9.53 240 3.58 268 4.00 1146 17.11
 Youngest child 3162 359 11.35 142 4.49 116 3.67 617 19.51
 Missing 678 60 8.85 14 2.06 30 4.42 104 15.34
 Total 67,574 6796 10.06 2150 3.18 1675 2.48 10,621 15.72
Number of younger siblings
 None (only child) 49,097 4884 9.95 1469 2.99 993 2.02 7346 14.96
 One (oldest child) 3691 421 11.41 119 3.22 90 2.44 630 17.07
 Two or more (oldest child) 4250 434 10.21 166 3.91 178 4.19 778 18.31
 Total 57,038 5739 10.06 1754 3.08 1261 2.21 8754 15.35
Number of older siblings
 None (only child) 49,097 4884 9.95 1469 2.99 993 2.02 7346 14.96
 One (youngest child) 2968 342 11.52 134 4.51 107 3.61 583 19.64
 Two or more (youngest child) 194 17 8.76 8 4.12 9 4.64 34 17.53
 Total 52,259 5243 10.03 1611 3.08 1109 2.12 7963 15.24