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Table 1 Under-reporting of birth registrations for live births in four years after birth, New South Wales, Australia, 2001–2005

From: Under-reporting of birth registrations in New South Wales, Australia

 

Year of birth

n

Year of birth

1st year after birth

2nd year after birth

3rd year after birth

4th year after birth

Non- registered

   

n

%

n

%

n

%

n

%

n

%

n

%

Non- risk group*

2001

44,146

37,117

84.08

4,832

10.95

279

0.63

176

0.40

157

0.36

1,585

3.59

2002

44,803

38,440

85.8

4,520

10.09

312

0.70

149

0.33

  

1,382

3.08

2003

45,579

39,256

86.13

4,445

9.75

267

0.59

    

1,611

3.53

2004

45,347

39,364

86.81

4,310

9.5

      

1,673

3.69

2005

48,358

41,699

86.23

        

6,659

13.77

Total

228,233

195,876

85.82

18,107

10.07

858

0.64

325

0.37

157

0.36

12,910

5.66

Risk group**

2001

40,324

31,562

78.27

4,707

11.67

368

0.91

313

0.78

285

0.71

3,089

7.66

2002

39,806

31,592

79.36

4,396

11.04

449

1.13

283

0.71

  

3,086

7.75

2003

39,421

31,286

79.36

4,271

10.83

424

1.08

    

3,440

8.73

2004

38,748

30,946

79.86

4,113

10.61

      

3,689

9.52

2005

40,541

31,738

78.29

        

8,803

21.71

Total

198,840

157,124

79.02

17,487

8.79

1241

0.62

596

0.30

285

0.14

22,107

11.12

Overall

2001

84,470

68,679

81.31

9,539

11.29

647

0.77

489

0.58

442

0.52

4,674

5.53

2002

84,609

70,032

82.77

8,916

10.54

761

0.90

432

0.51

  

4,468

5.28

2003

85,000

70,542

82.99

8,716

10.25

691

0.81

    

5,051

5.94

2004

84,095

70,310

83.61

8,423

10.02

      

5,362

6.38

2005

88,899

73,437

82.61

        

15,462

17.39

 

Total

427,073

353,000

82.66

35,594

10.53

2,099

0.83

921

0.54

442

0.52

35,017

8.20

  1. *Non-risk group: non-Indigenous, maternal age 25–39, gestational age 37–41 weeks, no neonatal or postneonatal death, birthweight ≥2,500 grams and living in major cities.
  2. **Risk group has one or more conditions: Indigenous, maternal age <25 or >39, gestational age <37 or >41 weeks, neonatal or postneonatal death, low birthweight (<2,500 grams), not living in major cities.
  3. Missing cases: 61 records which did not state the above conditions are excluded from the analysis.