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Table 2 AZM Zones with the highest low birthweight rates and standardized incidence ratios, Michigan 2004-2006.

From: Geographic analysis of low birthweight and infant mortality in Michigan using automated zoning methodology

Zone

LBW Cases

Births

Ratea

95% CI

SIRb

95% CI

RSE

298

160

972

16.4

15.4, 17.5

2.5

2.1, 2.9

7.9

295

105

722

14.5

13.4, 15.6

2.2

1.8, 2.7

9.7

318

44

303

14.5

10.5, 19.4

2.2

1.5, 2.9

15.0

288

265

1839

14.4

13.7, 15.0

2.2

1.9, 2.5

6.1

96

185

1297

14.2

13.4, 15.0

2.2

1.9, 2.5

7.3

282

256

1825

14.0

13.3, 14.6

2.1

1.9, 2.4

6.2

359

225

1605

14.0

13.3, 14.7

2.1

1.9, 2.4

6.6

283

224

1625

13.7

13.1, 14.4

2.1

1.8, 2.4

6.6

284

291

2214

13.1

12.5, 13.6

2.0

1.8, 2.2

5.8

111

73

561

13.0

10.1, 16.3

2.0

1.5, 2.4

11.7

95

286

2236

12.7

12.2, 13.3

1.9

1.7, 2.2

5.9

290

223

1764

12.6

12.0, 13.2

1.9

1.7, 2.2

6.6

281

365

2902

12.5

12.1, 13.0

1.9

1.7, 2.1

5.2

297

149

1216

12.2

11.5, 12.9

1.9

1.6, 2.2

8.1

360

220

1796

12.2

11.6, 12.8

1.9

1.6, 2.1

6.7

91

255

2083

12.2

11.7, 12.7

1.9

1.6, 2.1

6.2

300

194

1588

12.2

11.6, 12.8

1.9

1.6, 2.1

7.1

304

75

615

12.1

9.5, 15.2

1.9

1.4, 2.3

11.5

302

92

758

12.1

9.7, 14.8

1.8

1.5, 2.2

10.4

303

61

504

12.1

9.2, 15.5

1.8

1.4, 2.3

12.8

90

203

1691

12.0

11.4, 12.5

1.8

1.6, 2.1

7.0

296

87

770

11.2

9.0, 13.9

1.7

1.3, 2.1

10.7

106

145

1286

11.2

10.6, 11.8

1.7

1.4, 2.0

8.3

161

255

2313

11.0

10.5, 11.4

1.7

1.5, 1.9

6.2

301

320

2928

10.9

10.5, 11.3

1.7

1.5, 1.8

5.5

324

52

484

10.7

8.0, 14.0

1.6

1.2, 2.1

13.8

89

139

1356

10.2

9.7, 10.7

1.5

1.3, 1,8

8.4

80

107

1051

10.1

9.5, 10.7

1.5

1.2, 1.8

9.6

361

127

1254

10.1

9.5, 10.6

1.5

1.3, 1.8

8.8

292

51

505

10.0

7.5, 13.2

1.5

1.1, 2.0

14.0

286

232

2326

9.9

9.5, 10.3

1.5

1.3, 1.7

6.5

243

119

1204

9.8

9.3, 10.4

1.5

1.2, 1.8

9.1

244

78

802

9.7

7.6, 12.1

1.5

1.1, 1.8

11.3

320

37

383

9.6

6.8, 13.3

1.5

1.0, 1.9

16.4

85

62

674

9.1

7.0, 11.7

1.4

1.0, 1.7

12.7

251

62

674

9.1

7.0, 11.7

1.4

1.0, 1.7

12.7

43

63

685

9.1

7.0, 11.7

1.4

1.0, 1.7

12.5

77

69

787

8.7

6.8, 11.0

1.3

1.0, 1.6

12.0

317

97

1137

8.5

6.9, 10.4

1.3

1.0, 1.5

10.1

294

115

1366

8.4

7.9, 8.8

1.3

1.0, 1.5

9.3

33

81

963

8.4

6.6, 10.4

1.3

1.0, 1.5

11.1

338

158

1800

8.3

7.9, 8.7

1.2

1.0, 1.5

8.1

193

158

2016

7.8

7.4, 8.1

1.2

1.0, 1.4

7.9

311

160

2043

7.8

7.4, 8.1

1.2

1.0, 1.4

7.9

258

140

1815

7.7

7.3, 8.0

1.2

1.0, 1.4

8.4

105

112

1454

7.7

7.3, 8.0

1.2

0.9, 1.4

9.4

  1. Abbreviations: LBW, Low Birthweight; SIR Standardized Incidence Ratio; CI, Confidence Interval; RSE, Relative Standard Error
  2. a Rate is per 100 live births; b Standard Population of Michigan, 2000 incidence ratios, Michigan, 2004–2006.