Table 5.
Correlations in the 1980 Cohort Study
|
Mean GCSE/O-level grade |
Best three A-levels |
First year BMS outcome |
Second year BMS outcome |
Finals outcome |
On Specialist Register |
|
|---|---|---|---|---|---|---|
| Continuous censored | Continuous censored | Ordinal | Ordinal | Continuous | Binary | |
| Mean GCSE/O-level grade |
1 |
0.406 |
0.192 |
0.209 |
0.175 |
-0.022 |
| |
|
P
<0.001 |
P
<0.001 |
P
<0.001 |
P
= 0.002 |
NS |
|
n = 562 |
n = 542 |
n = 528 |
n = 313 |
n = 391 |
||
| Best three A-levels |
0.438 ± 0.035 (0.358 to 0.503) |
1 |
0.190 |
0.249 |
0.307 |
0.045 |
|
P
<0.001 |
P
<0.001 |
P
<0.001 |
NS |
|||
|
n = 562 |
n = 548 |
n = 328 |
n = 403 |
|||
| First year BMS outcome |
0.226 ± 0.041 (0.130 to 0.298) |
0.235 ± 0.042 (0.150 to 0.318) |
1 |
0.416 |
0.215 |
0.005 |
| |
P
<0.001 |
P
<0.001 |
NS |
|||
| |
n = 548 |
n = 329 |
n = 397 |
|||
| Second year BMS outcome |
0.235 ± 0.047 (0.148 to 0.338) |
0.293 ± 0.054 (0.174 to 0.379) |
0.512 ± 0.038 (0.434 to 0.582) |
1 |
0.359 |
0.080 |
|
P
<0.001 |
NS |
|||||
|
n = 329 |
n = 399 |
|||||
| Finals outcome (London only) |
0.182 ± 0.051 (0.081 to 0.280) |
0.323 ± 0.052 (0.229 to 0.426) |
0.244 ± 0.064 (0.107 to 0.357) |
0.410 ± 0.052 (0.304 to 0.511) |
1 |
0.084 |
| NS | ||||||
| n = 261 | ||||||
| On Specialist Register | -0.031 ± 0.062 (-0.146 to 0.090) | 0.054 ± 0.063 (-0.064 to 0.176) | 0.007 ± 0.079 (-0.142 to 0.156) | 0.119 ± 0.077 (-0.052 to 0.255) | 0.104 ± 0.074 (-0.038 to 0.250) | 1 |
Abbreviations: A-level, Advanced level; BMS, Basic medical sciences; GCSE, General Certificate of Secondary Education; MCMC, Markov Chain Monte Carlo; NS, not significant; O-level, Ordinary level.
aCorrelations in entrants to medical school between measures of academic and professional attainment attainment in the 1980 Cohort study.
bCorrelations above the diagonal are simple Pearson correlations (for example point-biserials, φ correlations. where a measure is binary or ordinal), and have different n values for various reasons.
cCorrelations shown in bold are significant at P<0.05.
dCorrelations in the lower triangle were calculated taking account of censoring, and for ordinal values are equivalent to tetrachoric/polychoric correlations.
eValues are mean ± SD (95% CI) unless otherwise stated, and the 95% confidence intervals are the result of the final 2000 MCMC steps in a chain of 5000.