TABLE 2

The Effect of VAS at Vaccination Contacts on All-Cause Mortality, Overall and by Gender

Rate per 1000 PYRS# (Deaths/PYRS)MRR (95% Confidence Interval)aTest of Interaction Between VAS and Genderb
Vitamin APlacebo
Follow-up for 6 mo
 All20.6 (38/1845)22.7 (42/1849)0.91 (0.59–1.41)
 Boys26.8 (25/932)13.9 (13/936)1.92 (0.98–3.75)0.003
 Girls14.2 (13/913)31.8 (29/913)0.45 (0.24–0.87)
Follow-up to next VAS campaign
 All19.0 (18/945)19.0 (18/948)1.00 (0.52–1.93)
 Boys29.2 (14/479)12.5 (6/478)2.31 (0.89–6.01)0.01
 Girls8.6 (4/466)25.6 (12/469)0.34 (0.11–1.05)
Follow-up for 12 mo
 All18.8 (66/3516)20.1 (71/3526)0.93 (0.67–1.30)
 Boys21.9 (39/1777)17.9 (32/1787)1.22 (0.77–1.95)0.10
 Girls15.5 (27/1739)22.4 (39/1739)0.69 (0.43–1.13)
  • #, person-years of observation.

  • a Analyzed by using Cox proportional-hazards models with age as underlying time scale.

  • b Tested using Wald test.