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. 2007 Jul 2;117(7):1988–1994. doi: 10.1172/JCI31097

Figure 1. Peripheral blood neutrophil counts at baseline and 6-week follow-up in PTB contacts and controls.

Figure 1

(A) Correlation between baseline and follow-up neutrophil count in PTB contacts. Peripheral blood neutrophil count was determined at baseline and 6 weeks later in 66 PTB contacts. Six-week counts correlated strongly and positively with baseline counts (Pearson’s r = 0.66; 95% confidence interval, 0.50 to 0.78; P < 0.001). (B) Correlation between baseline and follow-up neutrophil counts in control subjects. Peripheral blood neutrophil count was determined at baseline and 6 weeks later in 29 contacts of extrapulmonary TB. Six-week counts correlated strongly and positively with baseline counts (Pearson’s r = 0.67; 95% confidence interval, 0.40 to 0.83; P < 0.001). (C) Change in mean neutrophil counts between baseline and follow-up in PTB contacts versus control subjects. At baseline, PTB contacts had a higher mean neutrophil count than control subjects (4.2 × 109/l versus 3.7 × 109/l, respectively; P = 0.03). Mean neutrophil counts decreased in PTB contacts over 6 weeks (mean neutrophil count at baseline versus follow-up, 4.4 × 109/l versus 4.1 × 109/l, respectively; P = 0.02). Error bars represent SEM.