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Table 4 frequency of smear positive serial sputum samples by year of examination, Eastern Ethiopia

From: Smear-positive pulmonary tuberculosis and AFB examination practices according to the standard checklist of WHO’s tuberculosis laboratory assessment tool in three governmental hospitals, Eastern Ethiopia

Type of sputum sample

Year of examination

Total

P-value

2007/08 no. (%)

2008/09 no. (%)

2009/10 no. (%)

2010/11 no. (%)

2011/12 no. (%)

First spot sample

P = 0.98

Positive

56 (22.2)

55 (21.6)

56 (22.2)

55 (21.6)

51 (20.2)

273 (21.6)

Negative

196 (77.8)

200 (78.4)

196 (77.8)

200 (78.4)

201 (79.8)

993 (78.4)

Total

252 (19.9)

255 (20.1)

252 (19.9)

255 (20.1)

252 (19.9)

1266 (100)

Second morning sputum sample

P = 0.91

Positive

57 (22.6)

58 (22.7)

60 (23.8)

58 (22.7)

50 (19.8)

283 (22.4)

Negative

195 (77.4)

197 (77.3)

192 (76.2)

197 (77.3)

202 (80.2)

983 (77.6)

Total

252 (19.9)

255 (20.1)

252 (19.9)

255 (20.1)

252 (19.9)

1266 (100)

Third spot sample

P = 0.89

Positive

55 (21.8)

53 (20.8)

56 (22.2)

54 (21.2)

47 (18.7)

265 (20.9)

Negative

197 (78.2)

202 (79.2)

196 (77.8)

201 (78.8)

205 (81.3)

1001 (79.1)

Total

252 (19.9)

255 (20.1)

252 (19.9)

255 (20.1)

252 (19.9)

1266 (100)