Table 1

Maternal characteristics and birth outcomes, by BMI category (n=4340)

NAllUnderweight
<18.5 kg/m2
Normal
18.5–24.9 kg/m2
Overweight
25–29.9 kg/m2
Obese
≥30 kg/m2
Maternal demographics43404340632 (14.6%)3239 (74.6%)393 (9.1%)76 (1.8%)
Median age (IQR); years434024 (21–28)23 (20–26)24 (21–28)27 (23–30)29 (25–31)
Refugees43403180 (73.3%)410 (64.9%)2393 (73.9%)311 (79.1%)66 (86.8%)
Migrants43401160 (26.7%)222 (35.1%)846 (26.1%)82 (20.9%)10 (13.2%)
Ethnicity3281
 Karen2373307 (64.1%)1821 (74.7%)208 (70.3%)37 (53.6%)
 Burman537120 (25.1%)373 (15.3%)35 (11.8%)9 (13.0%)
 Burmese Muslim37152 (10.9%)243 (10.0%)53 (17.9%)23 (33.3%)
 Primigravida (G1P0)43401211 (27.9%)232 (36.7%)909 (28.1%)64 (16.3%)6 (7.9%)
 Mean height (SD), cm4340151.5 (5.13)152.2 (5.15)151.4 (5.13)151.4 (4.98)151.7 (5.34)
 Short (<153 cm)43402539 (58.5%)346 (54.7%)1916 (59.2%)237 (60.3%)40 (52.6%)
 Mean GWG (SD); kg43409.8 (3.8)10.9 (3.3)9.9 (3.7)7.6 (4.1)5.9 (4.8)
Birth outcomes
 Median EGA (IQR); wks434039.2 (38.5, 39.6)39.2 (38.4, 39.6)39.2 (38.5, 39.6)39.3 (38.5, 40.0)39.4 (38.5, 40.1)
 Mean BW (SD); g43403101.3 (274.6)3021.9 (247.1)3097.9 (272.2)3215.6 (278.3)3313.3 (279.4)
  • BMI, body mass index; EGA, estimated gestational age; GWG, gestational weight gain.