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Table 1 Month-specific proportions of pulmonary tuberculosis (TB) positive migrants to Kuwait; January 1, 1997 to December 31, 2006.

From: Seasonality in pulmonary tuberculosis among migrant workers entering Kuwait

Month

Total number tested

Number TB positive*

Number positive per 100,000

95% confidence interval

Jan

178370

368

206

186 – 229

Feb

164297

337

205

184 – 228

Mar

185644

451

243

222 – 266

Apr

166039

392

236

214 – 261

May

182717

418

229

208 – 252

June

189071

422

223

203 – 246

July

211845

437

206

188 – 227

Aug

206167

406

197

179 – 217

Sept

204198

356

174

157 – 193

Oct

227062

308

136

121 – 152

Nov

210844

362

172

155 – 190

Dec

202324

351

174

156 – 193

Total

2328582

4608

198

192 – 204

  1. * Un-adjusted (crude observed) month-specific number of pulmonary TB cases of the number of migrants tested during that month over the study period
  2. Overall monthly adjusted mean (weighted by average monthly number of migrants i.e. N/12) number of pulmonary TB cases was 384.