According to the formula of average development rate [ 18 ], the average development rate of active PTB registration rates in 13 years was 95.2%, that is, the annual decline of registration rates was 4.8%. Time series analysis The monthly active PTB registration rates from 2007 to 2019 in Henan Province showed a trend of volatility and decline (Fig. 1 ).
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Analysis and predication of tuberculosis registration rates in Henan Province, China: an exponential smoothing model study.
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Results The characteristics of registration rates From 2007 to 2019, the active PTB registration rates in Henan Province showed a decreasing trend from 88.0/100 000 to 49.0/100 000 in Table 1 .