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Table 1 Distributions of socioeconomic status and control variables by immigration status

From: Variation in the association between socioeconomic status and breastfeeding practices by immigration status in Taiwan: a population based birth cohort study

   Taiwanese mothers Immigrant mothers  
  Total China Southeast Asia p
  N (%) N (%) N (%) N (%)  
Total 21217 (100.00) 18416 (100.00) 955 (100.00) 1839 (100.00)  
Socioeconomic status          
Mother’s education level          
 1. 13 years 9564 (45.16) 9349 (50.84) 107 (11.20) 107 (5.84) <.0001
 2. 10 to 12 years 8476 (40.02) 7670 (41.71) 355 (37.17) 449 (24.52)  
 3. 9 years 3139 (14.82) 1371 (7.46) 493 (51.62) 1275 (69.63)  
 Missing = 41 38         
Father’s education level          
 1. 13 years 9705 (46.12) 9250 (50.65) 264 (27.85) 190 (10.38) <.0001
 2. 10 to 12 years 8407 (39.95) 7109 (38.93) 430 (45.36) 866 (47.32)  
 3. 9 years 2930 (13.92) 1902 (10.42) 254 (26.79) 774 (42.30)  
 Missing = 175 175         
Parental monthly income          
 1. NT$100,000 2378 (11.25) 2335 (12.72) 28 (2.93) 15 (0.82) <.0001
 2. NT$70,000 ~ NT$100,000 4419 (20.90) 4328 (23.57) 47 (4.92) 42 (2.30)  
 3. NT$50,000 ~ NT$70,000 5502 (26.02) 5086 (27.70) 173 (18.12) 242 (13.25)  
 4. NT$30,000 ~ NT$50,000 6364 (30.10) 5003 (27.25) 477 (49.95) 884 (48.39)  
 5. NT$30,000 2381 (11.73) 1607 (8.75) 230 (24.08) 644 (35.25)  
 Missing = 73 73         
Control variables          
Residential area          
 1. Rural 8981 (42.33) 7548 (40.99) 411 (42.86) 1019 (55.41) <.0001
 2. Urban 12236 (57.67) 10868 (59.01) 548 (57.14) 820 (44.59)  
Mother’s employment status          
 1. Unemployed 8939 (42.17) 6843 (37.20) 755 (78.73) 1340 (72.91) <.0001
 2. Employed 12257 (57.83) 11553 (62.80) 204 (21.27) 498 (27.09)  
 Missing = 21 21         
Mothers’ age          
 1. age < = 50th percentile = 29 11873 (55.96) 9640 (52.35) 626 (65.28) 1604 (87.22) <.0001
 2. age > 50th percentile = 29 9344 (44.04) 8776 (47.65) 333 (34.72) 235 (12.78)  
Fathers’ age          
 1. age < 50th percentile = 32 10710 (50.76) 10036 (54.85) 225 (23.49) 447 (24.31) <.0001
 2. age > 50th percentile = 32 10388 (49.24) 8262 (45.15) 733 (76.51) 1392 (75.69)  
 Missing = 119 119         
Child’s Sex          
 1. Girl 10091 (47.56) 8755 (47.54) 449 (46.82) 885 (48.12) -
 2. Boy 11126 (52.44) 9661 (52.46) 510 (53.18) 954 (51.88)  
Average years of living in Taiwan       3.4   3.3 -
 Missing = 3          
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