Table 1.

Characteristics of index and subsequent cases in households where transmission was not refuted

	Index case (n = 718)	Subsequent cases (n = 928)
Sex
Male	358/715 (50.1%)	481/924 (52.1%)
Age (years)
0–14	97/718 (13.5%)	364/928 (39.2%)
15–44	471/718 (65.6%)	442/928 (47.6%)
45–64	113/718 (15.7%)	93/928 (10.0%)
65+	37/718 (5.2%)	29/928 (3.1%)
Country of birtha
UK	210/685 (30.7%)	411/882 (46.6%)
India	129/685 (18.8%)	138/882 (15.7%)
Pakistan	78/685 (11.4%)	68/882 (7.7%)
Nepal	23/685 (3.4%)	24/882 (2.7%)
Somalia	59/685 (8.6%)	72/882 (8.2%)
Site of disease
Pulmonary	538/715 (75.2%)	603/903 (66.8%)

^aTop five countries of birth by number of cases notified in England between 2010 and 2012