Table 1.

Characteristics of Saudi Hajj pilgrims over the three years 2013–2015.

	Hajj Year
	2013	2014	2015	Total
First day of Hajj	13 October	2 October	22 September	–
Sample size	916	1959	4099	6974
Male:Female	1:1.6	1:1.4	1:1	1:1.2
Median (range) age in years	32 (18–95)	33 (18–95)	35 (18–88)	34 (18–95)
At increased risk	130/730 (17.8%)	312/1651 (18.9%)	874/3984 (21.9%)	1,316/6365 (20.7%)
Pregnant	10/472 (2.1%)	12/937 (1.3%)	38/2124 (1.8%)	60/3533 (1.7%)
Smoker	56/733 (7.6%)	147/1626 (9.0%)	513/4034 (12.7%)	716/6393 (11.2%)