| Birth weight |
Singletons Twins |
Odds ratio[95%CI] |
Odds ratio[95%CI] Twins vs. singletons |
Odds ratio[95%CI] Singletons |
Twins |
| Number |
IMR1 |
Number |
IMR1 |
| Q00-Q07 |
|
|
|
|
|
|
|
| <1000 |
46 |
13.9 |
23 |
28.3 |
2.04 [1.24-3.37]* |
145.15 [101.30-207.97]* |
48.88 [18.58-128.60]* |
| 1000-1499 |
75 |
14.9 |
41 |
27.3 |
1.84 [1.25-2.69]* |
155.49 [113.87-212.32]* |
47.10 [18.61-119.22]* |
| 1500-1999 |
132 |
10.3 |
58 |
11.6 |
1.13 [0.83-1.54] |
107.05 [81.42-140.74]* |
19.98 [8.02-49.83]* |
| 2000-2499 |
194 |
2 |
23 |
1.6 |
0.80 [0.52-1.24] |
21.00 [16.25-27.12]* |
2.78 [1.06-7.33]* |
| 2500-2999 |
163 |
0.3 |
5 |
0.6 |
2.06 [0.85-5.02] |
2.94 [2.26-3.82]* |
1.00 Reference |
| ≥3000 |
84 |
0.1 |
0 |
0 |
- |
1.00 Reference |
- |
| Q20-Q28 |
|
|
|
|
|
|
|
| <1000 |
469 |
141.7 |
153 |
188.4 |
1.34[1.11-1.61]* |
149.89 [133.81-167.91]* |
100.89 [25.00-407.19]* |
| 1000-1499 |
455 |
90.3 |
76 |
50.6 |
0.56 [0.44-0.71]* |
95.04 [84.76-106.56]* |
26.72 [6.56-108.82]* |
| 1500-1999 |
802 |
62.3 |
92 |
18.4 |
0.29 [0.24-0.36]* |
65.38 [59.34-72.03]* |
9.68 [2.39-39.31]* |
| 2000-2499 |
1575 |
16.3 |
100 |
7 |
0.43 [0.35-0.53]* |
17.07 [15.70-18.56]* |
3.70 [0.91-15.01]* |
| 2500-2999 |
2724 |
4.7 |
28 |
3.3 |
0.69 [0.48-1.003] |
4.91 [4.54-5.30]* |
1.71 [0.41-7.18] |
| ≥3000 |
840 |
1 |
2 |
1.9 |
1.98 [0.50-8.0] |
1.00 Reference |
1.00 Reference |
| Q90-99 |
|
|
|
|
|
|
|
| <1000 |
200 |
60.4 |
14 |
17.2 |
0.28 [0.17-0.49]* |
719.70 [551.10-939.87]* |
81.75 [23.49-284.54]* |
| 1000-1499 |
691 |
137.2 |
26 |
17.3 |
0.12 [0.08-0.18]* |
1646.35 [1295.20-2092.70]* |
82.09 [24.84-271.24]* |
| 1500-1999 |
1175 |
91.3 |
12 |
2.4 |
0.03 [0.01-0.05]* |
1090.53 [862.16-1379.38]* |
11.36[3.21-40.27]* |
| 2000-2499 |
797 |
8.3 |
3 |
0.2 |
0.03 [0.01-0.08]* |
97.97 [77.21-124.32]* |
1.00 Reference |
| 2500-2999 |
242 |
0.4 |
0 |
0 |
- |
4.95 [3.81-6.42]* |
- |
| ≥3000 |
74 |
0.1 |
0 |
0 |
- |
1.00 Reference |
- |
| Q00-Q99 |
|
|
|
|
|
|
|
| <1000 |
1094 |
330.6 |
268 |
329.9 |
0.998 [0.87-1.14] |
104.20 [97.11-111.81]* |
54.35 [40.53-72.87] |
| 1000-1499 |
1803 |
357.9 |
228 |
151.8 |
0.42 [0.36-0.48]* |
113.14 [106.60-120.08]* |
24.55 [18.24-33.04]* |
| 1500-1999 |
3109 |
241.5 |
254 |
50.8 |
0.21 [0.18-0.23]* |
75.44 [71.69-79.39]* |
8.13 [6.06-10.91]* |
| 2000-2499 |
3785 |
39.3 |
182 |
12.8 |
0.33 [0.28-0.38]* |
12.02 [11.45-12.62]* |
2.04 [1.51-2.77]* |
| 2500-2999 |
4317 |
7.5 |
54 |
6.3 |
0.84 [0.64-1.10] |
2.28 [2.17-2.38]* |
1.00 Reference |
| ≥3000 |
2873 |
3.3 |
13 |
12.4 |
3.77 [2.19-6.51]* |
1.00 Reference |
1.97 [1.08-3.61]* |
1 IMR per 10000 live births; CI: Confidence interval; *Significant at the 5% level
|
