Indicate the presence of numerical data in the abstract (whether numerical data plays a key role in medical records), solely using the information from the abstract.

[Q]: Abstract: Upper airway obstruction is usually diagnosed by visual examination of maximum expiratory and inspiratory flow-volume curves and by calculating a ratio of expiratory to inspiratory flow at 50 percent of vital capacity (mid-vital capacity flow ratio); however, reference values of this ratio have not been well established, and considerable variability exists. The purpose of this study was to examine the range of mid-vital capacity flow ratios in a group of healthy subjects and to determine if some of the variability is accounted for by different maximum inspiratory pressures. We measured maximum expiratory and inspiratory flows at 50 percent of vital capacity from the flow-volume curves, and maximum inspiratory pressures in a group of 60 healthy nonsmokers (30 men and 30 women) whose ages ranged from 21 to 40 years. We found that mid-vital capacity flow ratio (mean +/- SD) was 0.72 +/- 0.19 in men and 0.77 +/- 0.18 in women. The coefficient of variation of the mid-vital capacity flow ratio was 28 percent for men and 23 percent for women. The 95 percent confidence limits for the mid-vital capacity flow ratio were 0.65 to 0.79 for men and 0.70 to 0.84 for women. Maximum inspiratory pressures (mean +/- SD) were 129 +/- 30 cm H2O in men and 91 +/- 16 cm H2O in women, not significantly different from previous studies. Normalizing maximum inspiratory flow for maximum inspiratory pressure did not reduce the coefficient of variation, which became 29 percent in men and 30 percent in women. We conclude that the range of mid-vital capacity flow ratios is wide, and it cannot be reduced by standardizing it for maximum inspiratory pressures.
Question: Does the abstract contain any numerical data?
[A]: Yes

[Q]: Abstract: Records of 55 percutaneous renal biopsies performed in 53 children aged 5 days to two years were reviewed. Radiographic or ultrasound imaging techniques were not utilized during the biopsy procedure. Forty-nine of 55 biopsy attempts yielded sufficient tissue for histologic evaluation (89.1%). Transient gross hematuria not requiring intervention was the sole complication and was noted in 6 of 55 biopsy attempts (10.9%). Percutaneous renal biopsy can be performed safely in very young children and the success of the procedure is comparable to that in older children.
Question: Does the abstract contain any numerical data?
[A]: Yes

[Q]: Abstract: This report reviews 833 patients who underwent internal mammary artery grafting alone or with vein grafts between 1968 and 1981. Use of the internal mammary artery was indicated in young or middle-aged patients with the following characteristics: a significant lesion of the proximal left anterior descending artery or its diagonal branch alone (70.1%) or combined with diffuse atherosclerosis (19.9%) or a small caliber (3.4%); absent or unsuitable veins for grafting (5.5%); atherosclerosis or an aneurysm of the ascending aorta (0.6%); and failure of previous vein grafts (0.5%). The left anterior descending artery system was grafted by the left internal mammary artery in 53.2%, and the arterial graft was complimented by vein grafts in 2.6%. In 45.2% of the patients, grafts of the left anterior descending artery by the left internal mammary artery were supplemented by vein grafts to the right coronary artery (23.8%), to the circumflex artery (15.2%), or to both (6.2%). The overall operative mortality was 2.2%. It rose to 16.7% with associated cardiac procedures and to 18.5% in patients who were in New York Heart Association Class IV. If these two high-risk categories of patients are excluded, the perioperative death rate in the remaining 750 was only 0.4%. Of the 815 patients who survived the perioperative period (mean 53.1 months follow-up), 63.1% were relieved of angina and 83.4% were in Class I or II of the New York Heart Association, as compared to 27.4% before the operation. At cardiac recatheterization (mean 18.9 months), 87.9% of the internal mammary artery grafts and 63.3% of the vein grafts were patent (p less than 0.05). The cumulative actuarial 10 year survival rate was 88.6% +/- 1.3%.
Question: Does the abstract contain any numerical data?
[A]:
Yes