Table 1

Distribution of putative prognostic factors of age, stage, and grade in prospective (oxygen measurements obtained) and retrospective series

O2 measurements availableRetrospective series (prognosis)
Stage
 I235
 II2038
 III2641
 IV67
AgeMedian = 58.5Median = 50
 <Median2762
 >Median2759
Grade (differentiated)
 Well318
 Moderate3268
 Poor1017
 Unknown918