peters_test: Perform Peters Test
In replisims/peters-2016: Replication of Peters et al 2006

Perform Peters Test

1	peters_test(or_sim, n, a, b, c, d, sig_threshold = 0.1)

`or_sim`	or_sim Simulated odds ratio (as opposed to the OR give as a simulation parameter)
`n`	Number of aprticipants in intervention and controlgroup (i.e. half the sample size)
`a`	a from confusion matrix (i.e. number of events in exposed group)
`b`	b from confusion matrix (i.e. number of events in control group)
`c`	c fom confusion matrix (i.e. number of non-events in exposed group)
`d`	d from confusion matrix (i.e. number of non events in control group)
`sig_threshold`	threshold of significace defaults to 0.1 as in the original simulation