*Correlation, regression, and repeated data*, *Calculating
correlation coefficients with repeated observations: Part 1--correlation
within subjects*, and *Calculating correlation coefficients with
repeated observations: Part 2--correlation between subjects* provide
an excellent introduction to the subtleties of analyzing repeated
measurements on the same subject.

- Correlation, regression, and repeated data J Martin Bland & Douglas G Altman BMJ 1994;308:896 (2 April)
- Regression towards the mean J Martin Bland & Douglas G Altman BMJ 1994;308:1499 (4 June)
- Diagnostic tests 1: sensitivity and specificity Douglas G Altman & J Martin Bland BMJ 1994;308:1552 (11 June)
- Diagnostic tests 2: predictive values Douglas G Altman & J Martin Bland BMJ 1994;309:102 (9 July)
- Diagnostic tests 3: receiver operating characteristic plots Douglas G Altman & J Martin Bland BMJ 1994;309:188 (16 July)
- One and two sided tests of significance J Martin Bland & Douglas G Altman BMJ 1994;309:248 (23 July)
- Some examples of regression towards the mean J Martin Bland & Douglas G Altman BMJ 1994;309:780 (24 September)
- Quartiles, quintiles, centiles, and other quantiles Douglas G Altman & J Martin Bland BMJ 1994;309:996 (15 October)
- Matching J Martin Bland & Douglas G Altman BMJ 1994;309:1128 (29 October)
- Multiple significance tests: the Bonferroni method J Martin Bland & Douglas G Altman BMJ 1995;310:170 (21 January)
- The normal distribution Douglas G Altman & J Martin Bland BMJ 1995;310:298 (4 February)
- Calculating correlation coefficients with repeated observations: Part 1--correlation within subjects J Martin Bland & Douglas G Altman BMJ 1995;310:446 (18 February)
- Calculating correlation coefficients with repeated observations: Part 2--correlation between subjects J Martin Bland & Douglas G Altman BMJ 1995;310:633 (11 March)
- Absence of evidence is not evidence of absence Douglas G Altman & J Martin Bland BMJ 1995;311:485 (19 August)
- Presentation of numerical data J Martin Bland & Douglas G Altman BMJ 1996;312:572 (2 March)
- Logarithms J Martin Bland & Douglas G Altman BMJ 1996;312:700 (16 March)
- Transforming data J Martin Bland & Douglas G Altman BMJ 1996;312:770 (23 March)
- Transformations, means, and confidence intervals J Martin Bland & Douglas G Altman BMJ 1996;312:1079 (27 April)
- The use of transformation when comparing two means J Martin Bland & Douglas G Altman BMJ 1996;312:1153 (4 May)
- Comparing several groups using analysis of variance Douglas G Altman & J Martin Bland BMJ 1996;312:1472-1473 (8 June)
- Measurement error and correlation coefficients J Martin Bland & Douglas G Altman BMJ 1996;313:41-42 (6 July)
- Measurement error proportional to the mean J Martin Bland & Douglas G Altman BMJ 1996;313:106 (13 July)
- Interaction 1: heterogeneity of effects Douglas G Altman & John NS Matthews BMJ 1996;313:486 (24 August)
- Measurement error J Martin Bland & Douglas G Altman BMJ 1996;313:744 (21 September)
- Interaction 2: compare effect sizes not P values John NS Matthews & Douglas G Altman BMJ 1996;313:808 (28 September)
- Interaction 3: How to examine heterogeneity John NS Matthews & Douglas G Altman BMJ 1996;313:862 (5 October)
- Detecting skewness from summary information Douglas G Altman & J Martin Bland BMJ 1996;313:1200 (9 November)
- Cronbach's alpha J Martin Bland & Douglas G Altman BMJ 1997;314:572 (22 February)
- Units of analysis Douglas G Altman & J Martin Bland BMJ 1997;314:1874 (28 June)
- Trials randomised in clusters J Martin Bland & Sally M Kerry BMJ 1997;315:600 (6 September)
- Analysis of a trial randomised in clusters Sally M Kerry & Martin Bland BMJ 1998;316:54
- Weighted comparison of means Martin Bland & Sally M Kerry BMJ 1998;316:129 (10 January)
- Sample size in cluster randomisation Sally M Kerry & J Martin Bland BMJ 1998;316:549 (14 February)
- The intracluster correlation coefficient in cluster randomisation Sally M Kerry & J Martin Bland BMJ 1998;316:1455-1460 (9 May)
- Generalisation and extrapolation Douglas G Altman & J Martin Bland BMJ 1998;317:409-410 (8 August)
- Time to event (survival) data Douglas G Altman & J Martin Bland BMJ 1998;317:468-469 (15 August)
- Bayesians and frequentists J Martin Bland & Douglas G Altman BMJ 1998;317:1151-1160 (24 October)
- Survival probabilities (the Kaplan-Meier method) J Martin Bland, & Douglas G Altman BMJ 1998;317:1572-1580 (5 December)
- Treatment allocation in controlled trials: why randomise? Douglas G Altman & J Martin Bland BMJ 1999;318:1209-1209 (1 May)
- Variables and parameters Douglas G Altman & J Martin Bland BMJ 1999;318:1667-1667 (19 June)
- How to randomise Douglas G Altman & J Martin Bland BMJ 1999;319:703-704 (11 September)
- The odds ratio Douglas G Altman & J Martin Bland BMJ 2000;320:1468 (27 May)
- Blinding in clinical trials and other studies Simon J Day & Douglas G Altman BMJ 2000;321:504 (19 August)
- Concealing treatment allocation in randomised trials Douglas G Altman & Kenneth F Schulz BMJ 2001;323:446-447 (25 August)
- Analysing controlled trials with baseline and follow up measurements Andrew J Vickers & Douglas G Altman BMJ 2001;323:1123-1124 (10 November)
- Validating scales and indexes J Martin Bland & Douglas G Altman BMJ 2002;324:606-607 (9 March)
- Interaction revisited: the difference between two estimates Douglas G Altman & J Martin Bland BMJ 2003;326:219 (25 January)
- The logrank test J Martin Bland & Douglas G Altman BMJ 2004 328(7447):1073 (1 May)
- Diagnostic tests 4: likelihood ratios. JJ Deeks & Douglas G Altman BMJ 2004 329:168-169