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Table 1 Demographic and birth characteristics of newborns in Taiwan, by maternal status

From: Association of maternal ethnicity and urbanicity on severe pediatric disease: a nationwide cohort study

 Urban TBMs (n = 682,982)Rural TBMs (n = 662,818)Urban FBMs (n = 61,570)Rural FBMs (n = 87,473)P
No.(%)No.(%)No.(%)No.(%)
(a) Children        <.0001
Birth year
 200489,070(13.04)92,131(13.90)10,036(16.30)16,024(18.32) 
 200586,030(12.60)87,534(13.21)9466(15.37)14,995(17.14) 
 200686,886(12.72)86,747(13.09)8838(14.35)13,069(14.94) 
 200789,043(13.04)86,924(13.11)8017(13.02)11,161(12.76) 
 200886,835(12.71)84,528(12.75)7396(12.01)9915(11.33) 
 200986,556(12.67)82,350(12.42)6539(10.62)8636(9.87) 
 201070,995(10.39)65,116(9.82)5355(8.70)6734(7.70) 
 201187,567(12.82)77,488(11.69)5923(9.62)6939(7.93) 
Sex        0.0606
 Male356,481(52.19)346,345(52.25)32,260(52.40)46,068(52.67) 
 Female326,501(47.81)316,473(47.75)29,310(47.60)41,405(47.33) 
Birth weight (g)
 mean (SD)(3113.6±430.2)a(3090.9±433.1)b(3185.6±415.1)c(3154.0±410.4)d<.0001
  < 250039,116(5.73)41,935(6.33)2275(3.69)3545(4.05)<.0001
 normal629,974(92.24)608,332(91.78)57,558(93.48)81,939(93.67) 
  ≥ 400013,892(2.03)12,551(1.89)1737(2.82)1989(2.27) 
Gestational age (wk)
 (mean ± SD)(38.41±1.54)a(38.35±1.57)b(38.66±1.44)c(38.60±1.45)d<.0001
 Preterm (<  37 wk)47,233(6.92)a50,349(7.60)b3077(5.00)c4829(5.52)d<.0001
Birth weight for gestational age e        <.0001
 SGA65,520(9.59)69,723(10.52)4743(7.70)7508(8.58) 
 AGA550,004(80.53)531,092(80.13)49,439(80.30)70,863(81.01) 
 LGA67,458(9.88)62,003(9.35)7388(12.00)9102(10.41) 
(b) Mothers
 Maternal age (yrs)
   (mean ± sd)(30.79±4.57)a(28.96±4.57)b(27.48±4.69)c(26.69±4.61)d<.0001
   < 207128(1.04)15,725(2.37)752(1.22)1631(1.86)<.0001
  20–2451,123(7.49)99,752(15.05)17,440(28.33)30,411(34.77) 
  25–29199,751(29.25)248,871(37.55)24,303(39.47)33,486(38.28) 
  30–34286,900(42.01)218,267(32.93)13,912(22.60)16,216(18.54) 
   ≥ 35138,080(20.22)80,203(12.10)5163(8.39)5729(6.55) 
Employment        <.0001
 No157,012(22.99)169,162(25.52)50,167(81.48)72,149(82.48) 
 Yes498,778(73.03)484,835(73.15)8602(13.97)11,803(13.49) 
 Missing27,192(3.98)8821(1.33)2801(4.55)3521(4.03) 
Monthly income f        <.0001
  < p20159,098(23.29)171,260(25.84)50,212(81.55)72,205(82.55) 
 p20-p60130,885(19.16)145,481(21.95)4754(7.72)7305(8.35) 
  > p80365,807(53.56)337,256(50.89)3803(6.18)4442(5.08) 
 Missing27,192(3.98)8821(1.33)2801(4.55)3521(4.03) 
  1. a, b, c, d different letter represent significant difference among four materanl groups e SGA small for gestational age, AGA appropriate for gestational age, LGA large for gestational age
  2. f p20 (percentile 20) = TWD$15,840; p40 = TWD $19,200; p60 = TWD $21,900; p80 = TWD $34,800