Table 3

Correlations in the 1990 Cohort Studya,b,c,d,e
aAH5 Mean GCSE/O-level grade Best three A-levels BMS outcome Finals outcome MRCP(UK) Part 1 MRCP(UK) Pt 2 Written MRCP(UK) Pt 2 Clinical On Specialist Register
Continuous Continuous censored Continuous censored Ordinal Ordinal Continuous Continuous Continuous Binary
aAH5 1 0.203 0.179 0.037 0.051 0.126 0.276 0.179 0.037
P<0.001 P<0.001 P = 0.313 P = 0.216 P = 0.051 P<0.001 P = 0.025 P = 0.339
n = 714 n = 762 n = 766 n = 597 n = 242 n = 193 n = 156 n = 670
Mean GCSE/O-level grade 0.223 ± 0.034 (0.155 to 0.292) 1 0.250 0.141 0.138 0.245 0.096 0.235 0.047
P<0.001 P<0.001 P<0.001 P<001 P = 0.014 P<0.001 P = 0.022
n = 2662 n = 2657 n = 2072 n = 829 n = 660 n = 526 n = 2351
Best three A-levels 0.190 ± 0.036 (0.117 to 0.264) 0.561 ± 0.007(0.548 to 0.573) 1 0.128 0.100 0.230 0.085 0.096 0.147
P<0.001 P<0.001 P<0.001 P = 0.019 P = 0.019 P<0.001
n = 3096 n = 2413 n = 957 n = 753 n = 597 n = 2664
BMS outcome 0.050 ± 0.042 (-0.033 to 0.131) 0.192 ± 0.206 (0.134 to 0.237) 0.191 ± 0.018 (0.151 to 0.227) 1 0.210 0.296 0.111 0.102 0.097
P<0.001 P<0.001 P = 0.002 P = 0.012 P<0.001
n = 2506 n = 989 n = 777 n = 614 n = 2760
Finals outcome 0.055 ± 0.058 (-0.066 to 0.155) 0.202 ± 0.023 (0.154 to 0.241) 0.167 ± 0.025 (0.115 to 0.219) 0.391 ± 0.033 (0.322 to 0.453) 1 0.281 0.167 0.188 0.143
P<0.001 P<0.001 P<0.001 P<0.001
n = 872 n = 698 n = 571 n = 2337
MRCP(UK) Part 1 0.120 ± 0.062 (0.002 to 0.249) 0.272 ± 0.032 (0.209 to 0.331) 0.256 ± 0.032 (0.184 to 0.314) 0.384 ± 0.034 (0.321 to 0.452) 0.352 ± 0.039 (0.269 to 0.427) 1 0.208 0.182 0.253
P<0.001 P<0.001 P<0.001
n = 730 n = 571 n = 938
MRCP(UK) Part 2 written (old format) 0.270 ± 0.067 (0.140 to 0.393) 0.115 ± 0.035 (0.049 to 0.184) 0.067 ± 0.039 (-0.020 to 0.138) 0.170 ± 0.055 (0.061 to 0.278) 0.214 ± 0.045 (0.134 to 0.305) 0.202 ± 0.034 (0.133 to 0.271) 1 0.233 0.086
P<0.001 P = 0.019
n = 606 n = 743
MRCP(UK) Part 2 clinical (old format) 0.189 ± 0.072 (0.034 to 0.321) 0.249 ± 0.047 (0.158 to 0.339) 0.119 ± 0.047 (0.031 to 0.208) 0.164 ± 0.063 (0.051 to 0.286) 0.233 ± 0.048 (0.126 to 0.326) 0.175 ± 0.039 (0.091 to 0.247) 0.245 ± 0.040 (0.166 to 0.321) 1 0.120
P<0.004
n = 582
On Specialist Register 0.032 ± 0.047 (-0.064 to 0.120) 0.025 ± 0.017 (-0.018 to 0.058) 0.200 ± 0.027 (0.143 to 0.243) 0.160 ± 0.032 (0.099 to 0.217) 0.240 ± 0.033 (0.176 to (0.303) 0.317 ± 0.03 7(0.250 to 0.391) 0.116 ± 0.048 (0.0228 to 0.209) 0.163 ± 0.054 (0.051 to 0.273) 1

Abbreviations: aAH5, Abbreviated AH5; A-level, Advanced level; BMS, Basic medical sciences; GCSE, General Certificate of Secondary Education; MCMC, Markov Chain Monte Carlo; MRCP(UK), Membership of the Royal College of Physicians of the United Kingdom.

aCorrelations in entrants to medical school between measures of academic and professional attainment attainment in the 1990 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/biserial/polychoric correlations.

eValues are mean ± SD (95% CI) unless otherwise stated, and the 95% CIs are the result of the final 2000 MCMC steps in a chain of 5000.

McManus et al.

McManus et al. BMC Medicine 2013 11:242   doi:10.1186/1741-7015-11-242

Open Data