Table 1.
Numbers infected, (Yi1, Yi2), from a hypothetical randomized trial of pneumococcal conjugate vaccine with 2000 households, where person 1 (one-year-old) was randomized to 1:1 to vaccine or control, and person 2 (the mother) was not vaccinated (vaccination status (Ai1, Ai2)) and half the households have either low or high socioeconomic status (SES)
| Yi1 = 0, Yi2 = 0 (n=1200) | Yi1 = 1, Yi2= 0 (n=416) | Yi1 = 1, Yi2= 1 (n=384) | Total (n=2000) | |
|---|---|---|---|---|
| Low SES: Ai1 = 0, Ai2 = 0 | 200 | 120 | 180 | 500 |
| Ai1 = 1, Ai2 = 0 | 350 | 96 | 54 | 500 |
| High SES: Ai1 = 0, Ai2 = 0 | 250 | 125 | 125 | 500 |
| Ai1 = 1, Ai2 = 0 | 400 | 75 | 25 | 500 |