Chapter 3: RESULTS
From 10/2009 to 3/ 2013, at Central Obstetric and Geneacology Hospial and Hai Phong Central Obstetric and Geneacology Hospial, there were 3420 mothers and their babies selected and taken part in the reseach.
Table 3.1. Baseline Characteristics of the study subjects
Characteristics
|
Number
|
%
|
Age
|
18-19
|
154
|
4,5
|
20-35
|
3079
|
90
|
36-40
|
187
|
5,5
|
Ocupation
|
Housewife
|
1131
|
33,1
|
Worker
|
793
|
23,2
|
Farmer
|
352
|
10,3
|
Officer
|
1014
|
29,7
|
Other
|
130
|
3,8
|
Living
|
Urban
|
1654
|
48,4
|
Countryside
|
1766
|
51,6
|
Parity
|
Nullnipara
|
1936
|
56,6
|
Multipara
|
1484
|
43,4
|
Sex
|
male
|
1874
|
54,8
|
female
|
1546
|
45,2
|
3.1. OJECTIVE 1: Vietnamese birth anthropometry by GA from 28-42 weeks and percentile charts.
3.1.1. Birth weight by GA
It was shown that the male birth weight was higher than female birth weight. For both sexes, male and female, the birth weight by GA from 28-34 weeks increased according linear function, from 35-42 weeks the weight of the babies growth with quadratic function as follow:
age (week)
|
Function
|
The equation
|
r
|
p
|
28-34
|
Both sexses
|
Y= 164,39.x - 3530
|
0,88
|
0,0001
|
Male
|
Y= 171,47.x – 3741
|
0,88
|
0,0001
|
Female
|
Y= 165,97.x – 3570
|
0,88
|
0,0001
|
35-42
|
Both sexses
|
Y = -27,146.x2 + 2258. x – 43600
|
0,75
|
0,0001
|
Male
|
Y = -23,754.x2 +1999.x - 38580
|
0,77
|
0,0001
|
Female
|
Y = -23,025.x2 +1920.x- 36760
|
0,77
|
0,0001
|
Replace x by GA, the mean birth weight Y wuold be calculated Base on the recipe of calculating pecentiles, we had table and chart as follow:
Table 3.2.Both sexes, male, female birth weight Percentiles by GA
GA (week)
|
n
|
SD
|
Percentile
|
3rd
|
5th
|
10th
|
50th
|
90th
|
95th
|
97th
|
Both sexes
|
28
|
108
|
86
|
910
|
931
|
962
|
1073
|
1183
|
1214
|
1235
|
29
|
126
|
108
|
1032
|
1058
|
1098
|
1237
|
1376
|
1416
|
1441
|
30
|
154
|
131
|
1155
|
1185
|
1233
|
1401
|
1569
|
1617
|
1648
|
31
|
209
|
153
|
1277
|
1313
|
1369
|
1566
|
1762
|
1819
|
1855
|
32
|
238
|
176
|
1399
|
1440
|
1505
|
1730
|
1956
|
2020
|
2061
|
33
|
250
|
198
|
1521
|
1568
|
1640
|
1895
|
2149
|
2221
|
2268
|
34
|
284
|
221
|
1664
|
1716
|
1796
|
2080
|
2363
|
2443
|
2495
|
35
|
234
|
243
|
1842
|
1899
|
1988
|
2300
|
2611
|
2700
|
2757
|
36
|
213
|
266
|
2019
|
2082
|
2179
|
2520
|
2860
|
2957
|
3020
|
37
|
227
|
288
|
2240
|
2308
|
2413
|
2783
|
3152
|
3257
|
3325
|
38
|
345
|
310
|
2420
|
2493
|
2607
|
3005
|
3403
|
3516
|
3589
|
39
|
495
|
333
|
2546
|
2624
|
2746
|
3172
|
3599
|
3721
|
3799
|
40
|
359
|
355
|
2617
|
2700
|
2830
|
3286
|
3741
|
3871
|
3955
|
41
|
148
|
378
|
2634
|
2723
|
2861
|
3345
|
3829
|
3968
|
4056
|
42
|
30
|
403
|
2592
|
2687
|
2834
|
3350
|
3866
|
4013
|
4108
|
Male
|
28
|
66
|
93
|
903
|
925
|
958
|
1078
|
1197
|
1230
|
1252
|
29
|
69
|
115
|
1027
|
1055
|
1096
|
1244
|
1391
|
1433
|
1460
|
30
|
87
|
137
|
1152
|
1185
|
1234
|
1410
|
1585
|
1635
|
1667
|
31
|
130
|
159
|
1277
|
1315
|
1372
|
1576
|
1779
|
1837
|
1874
|
32
|
152
|
181
|
1401
|
1445
|
1510
|
1742
|
1973
|
2039
|
2082
|
33
|
136
|
203
|
1548
|
1597
|
1670
|
1930
|
2189
|
2263
|
2311
|
34
|
154
|
225
|
1712
|
1766
|
1847
|
2135
|
2423
|
2505
|
2558
|
35
|
123
|
247
|
1885
|
1944
|
2033
|
2350
|
2666
|
2756
|
2814
|
36
|
124
|
269
|
2084
|
2148
|
2245
|
2590
|
2934
|
3032
|
3095
|
37
|
130
|
291
|
2281
|
2351
|
2456
|
2829
|
3201
|
3307
|
3376
|
38
|
178
|
313
|
2473
|
2548
|
2661
|
3062
|
3462
|
3576
|
3650
|
39
|
241
|
335
|
2606
|
2686
|
2807
|
3236
|
3664
|
3787
|
3865
|
40
|
192
|
357
|
2678
|
2764
|
2893
|
3350
|
3806
|
3937
|
4021
|
41
|
75
|
379
|
2693
|
2784
|
2920
|
3406
|
3891
|
4029
|
4118
|
42
|
17
|
385
|
2751
|
2843
|
2982
|
3475
|
3967
|
4108
|
4198
|
Female
|
28
|
42
|
78
|
914
|
932
|
961
|
1061
|
1160
|
1189
|
1207
|
29
|
57
|
100
|
1035
|
1058
|
1095
|
1223
|
1351
|
1387
|
1411
|
30
|
67
|
123
|
1154
|
1183
|
1228
|
1386
|
1543
|
1588
|
1617
|
31
|
79
|
145
|
1275
|
1309
|
1362
|
1548
|
1733
|
1786
|
1820
|
32
|
86
|
167
|
1397
|
1436
|
1497
|
1711
|
1924
|
1985
|
2024
|
33
|
114
|
190
|
1522
|
1567
|
1636
|
1880
|
2123
|
2192
|
2237
|
34
|
130
|
212
|
1651
|
1701
|
1778
|
2050
|
2321
|
2398
|
2448
|
35
|
111
|
235
|
1828
|
1883
|
1969
|
2270
|
2570
|
2656
|
2711
|
36
|
89
|
257
|
2035
|
2096
|
2190
|
2519
|
2847
|
2941
|
3002
|
37
|
97
|
279
|
2233
|
2299
|
2400
|
2758
|
3115
|
3216
|
3282
|
38
|
167
|
302
|
2383
|
2454
|
2564
|
2951
|
3337
|
3447
|
3518
|
39
|
254
|
324
|
2488
|
2565
|
2683
|
3098
|
3512
|
3630
|
3707
|
40
|
167
|
347
|
2547
|
2629
|
2755
|
3200
|
3644
|
3770
|
3852
|
41
|
73
|
369
|
2560
|
2646
|
2781
|
3254
|
3726
|
3861
|
3947
|
42
|
13
|
380
|
2548
|
2637
|
2776
|
3263
|
3749
|
3888
|
3977
|
Base on the above tables, the charts below were drawn and applicated in clinic
Chart 3.1. Percentiles curves for birth weight from 28-42 weeks
b y gestaional age: both sexes
Chart 3.2. Percentiles curves for birth weight from 28-42 weeks
b y gestaional age: male
Chart 3.3. Percentiles curves for birth weight from 28-42 weeks
by gestaional age: both sexes
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