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Biostatistics

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REVIEW QUESTIONS AND EXERCISES 745<br />

Time (s) TF-IMT<br />

60% PI max<br />

Time (s) TF-IMT<br />

10% PI max<br />

Week 0 Week 10 Week 0 Week 10<br />

330 544 430 476<br />

400 590 400 320<br />

720 624 900 650<br />

249 330 420 330<br />

144 369 679 486<br />

440 789 522 369<br />

440 459 116 110<br />

289 529 450 474<br />

819 1099 570 700<br />

540 930 199 259<br />

Source: Data provided courtesy of Dr. Yvonne F. Heijdra.<br />

26. The three objectives of a study by Wolkin et al. (A-28) were to determine (a) the effects of chronic<br />

haloperidol treatment on cerebral metabolism in schizophrenic patients, (b) the relation between<br />

negative symptoms and haloperidol-induced regional changes in cerebral glucose utilization, and (c)<br />

the relation between metabolic change and clinical antipsychotic effect. Subjects were 18 male<br />

veterans’ hospital inpatients (10 black, five white, and three Hispanic) with either acute or chronic<br />

decompensation of schizophrenia. Subjects ranged in age from 26 to 44 years, and their duration of<br />

illness ranged from 7 to 27 years. Among the data collected were the following pretreatment scores<br />

on the digit-symbol substitution subtest of the WAIS-R (DSY1RW) and haloperidol-induced change<br />

in absolute left dorsolateral prefrontal cortex (DLLA3V1) and absolute right dorsolateral prefrontal<br />

cortex (DLRA3V1) measured in units of mmol glucose/100 g tissue/min:<br />

DSY1RW DLLA3V1 DLRA3V1 DSY1RW DLLA3V1 DLRA3V1<br />

47 7:97 17:17 18 4:91 9:58<br />

16 8:08 9:59 0 1:71 .40<br />

31 10:15 11:58 29 4:62 4:57<br />

34 5:46 2:16 17 9.48 11.31<br />

22 17:12 12:95 38 6:59 6:47<br />

70 12:12 13:01 64 12:19 13:61<br />

59 9:70 12:61 52 15:13 11:81<br />

41 9:02 7:48 50 10:82 9:45<br />

0 4.67 7.26 62 4:92 1:87<br />

Source: Data provided courtesy of Dr. Adam Wolkin.<br />

27. The purpose of a study by Maltais et al. (A-29) was to compare and correlate the increase in arterial<br />

lactic acid (La) during exercise and the oxidative capacity of the skeletal muscle in patients with<br />

chronic obstructive pulmonary disease (COPD) and control subjects (C). There were nine subjects in<br />

each group. The mean age of the patients was 62 years with a standard deviation of 5. Control<br />

subjects had a mean age of 54 years with a standard deviation of 3. Among the data collected were the

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