Table 2.

Mortality rates per 100 person-years (deaths/person-years) according to presence at 1978 and 1979 examinations

	Mortality rate (deaths/person-years)
Age in months	Examined	Absent	Mortality rate ratio, examined vs absent (95% CI)
1978 examination
0–5	15.7 (18/114.9)	13.1 (6/45.7)	1.19 (0.45 to 3.67)
6–11	18.2 (18/98.9)	21.5 (5/23.3)	0.85 (0.30 to 2.92)
12–35	13.0 (51/391.8)	9.3 (6/64.4)	1.40 (0.60 to 3.98)
36–71	3.4 (16/472.4)	0 (0/87.9)	NA
Total*	9.9 (103/1077.9)	7.2 (17/221.3)	1.35 (0.80 to 2.28)
1979 examination
0–5	4.5 (5/111.1)	0 (0/20.4)	NA
6–11	3.4 (4/118.2)	19.8 (4/20.2)	0.17 (0.03 to 0.92)
12–35	3.8 (14/365.6)	8.0 (4/49.8)	0.48 (0.15 to 1.99)
36–71	0.7 (3/427.6)	0 (0/61.9)	NA
Total*	2.6 (26/1022.5)	5.2 (8/152.3)	0.49 (0.22 to 1.09)

Children aged 0–5 years.

*Age-adjusted.

NA, not applicable.