Biostatistics

REVIEW QUESTIONS AND EXERCISES 393
(PO 2 ) (mm Hg)
Measurement Times
Subject Treatment a PRE-ING PRE-EX 10-km 20-km 30-km 15-POST-EX
3 2 36.00 30.00 52.00 65.00 65.00 36.00
4 1 34.00 21.00 65.00 62.00 62.00 59.00
4 2 46.00 36.00 65.00 72.00 72.00 66.00
5 1 36.00 24.00 41.00 43.00 50.00 46.00
5 2 41.00 25.00 52.00 60.00 67.00 54.00
6 1 28.00 31.00 52.00 60.00 53.00 46.00
6 2 34.00 21.00 57.00 58.00 57.00 41.00
7 1 39.00 28.00 72.00 69.00 65.00 72.00
7 2 40.00 27.00 64.00 61.00 57.00 60.00
8 1 49.00 27.00 67.00 61.00 51.00 49.00
8 2 27.00 22.00 56.00 64.00 49.00 34.00
(PCO 2 ) (mm Hg)
Measurement Times
Subject Treatment a PRE-ING PRE-EX 10-km 20-km 30-km 15-POST-EX
1 1 31.70 30.20 28.20 29.80 28.20 30.10
1 2 24.60 24.40 34.40 35.20 30.90 34.00
2 1 27.10 35.90 31.30 35.40 34.10 42.00
2 2 21.70 37.90 31.90 39.90 45.10 48.00
3 1 37.40 49.60 39.90 39.70 39.80 42.80
3 2 38.40 42.10 40.90 37.70 37.70 45.60
4 1 36.60 45.50 34.80 33.90 34.00 40.50
4 2 39.20 40.20 31.90 32.30 33.70 45.90
5 1 33.70 39.50 32.90 30.50 28.50 37.20
5 2 31.50 37.30 32.40 31.90 30.20 31.70
6 1 35.00 41.00 38.70 37.10 35.80 40.00
6 2 27.20 36.10 34.70 36.30 34.10 40.60
7 1 28.00 36.50 30.70 34.60 34.30 38.60
7 2 28.40 31.30 48.10 43.70 35.10 34.70
8 1 22.90 28.40 25.70 28.20 32.30 34.80
8 2 41.40 41.80 29.50 29.90 31.30 39.00
a 1 ¼ Sodium citrate; 2 ¼ placebo.
Source: Data provided courtesy of Dr. Jeffrey A. Potteiger.
45. Teitgeetal.(A-48)describearadiographicmethod to demonstrate patellar instability. The 90
subjects ranged in age from 13 to 52 years and were divided into the following four groups on
the basis of clinical findings regarding the nature of instability of the knee: normal (no
symptoms or signs related to the knee), lateral, medial, and multidirectional instability. Among
the data collected were the following radiographic measurements of the congruence angle
(degrees):