Table 3. Comparisons of seasonal amplitude of active TB notification among different subgroups in Xinjiang.

Group		Peak/ Trough Month	Mean seasonal amplitude (%)	SE (%)	95% CI (%)	P value
All active TB cases		March / October	77.31	6.93	61.63–92.98
Sex	Male	March / October	75.00	7.08	58.98–91.02	> 0.05
	Female	March / October	80.71	6.82	65.30–96.13
Age	0–14	March / January	109.56	8.07	91.30–127.82	< 0.05
	15–24	May / October	80.40	4.61	69.98–90.82
	25–44	March / October	70.58	4.36	60.72–80.44
	45–64	March / October	85.61	7.28	69.13–102.09
	65+	March / October	88.30	10.29	65.02–111.58
Ethnicity	Han	March / October	69.00	7.14	52.84–85.16	> 0.05
	Uygur	March / October	83.96	7.56	66.85–101.06
	Kazak	April / October	75.40	8.82	55.45–95.35
	Others	April / October	76.57	6.18	62.58–90.56
Occupation	Peasant	March / October	86.37	8.35	67.48–105.25	< 0.05
	Herder	November / September	111.38	14.92	77.62–145.13
	Migrant worker	April / February	102.00	4.82	91.09–112.90
	Unemployed	March / October	81.00	3.96	72.05–89.95
	Students	May / December	129.21	5.91	115.85–142.57
	Others	April / October	60.10	4.26	50.48–69.73
Regions	Northern Xinjiang	April / October	72.88	5.40	60.66–85.11	> 0.05
	Southern Xinjiang	March / October	84.83	7.80	67.19–102.47
Disease Site	Pulmonary TB	March / October	77.46	6.98	61.68–93.24	< 0.05
	Pleural TB	May / October	178.31	30.40	109.53–247.08
Sputum smear microscopy	Positive TB	March / October	75.86	10.65	51.78–99.94	> 0.05
	Negative TB	March / October	89.19	5.83	76.01–102.37
Sputum smear positive	New case	March / October	74.27	12.27	46.51–102.03	> 0.05
	Relapse case	March / December	94.92	8.41	75.90–113.95