In Japan, 28.8% of studies involved personal in depth interviews, compared to only 6.9% in Korea. Korean studies had the highest rate of questionnaire use at 32.2%. As for nursing intervention as a prescription research, Korea had 9.2% of articles, and Japan had three articles only 2.5% (Table 3). Japan had the highest rate of convenience sampling at 83.9%, compared to 67.8% in Korea. Total sampling was reported in 15.0% of articles in Korea, and 2.5% of articles in Japan (Table 4). Sample sizes range from 100 to 499 was reported in 38.1% of articles in Japan, and 37.9% of articles in Korea. In Korea, 12.6% of articles reported sample sizes exceeding 1,000. Samples sizes of 30 or less were reported in 33.9% of articles in Japan, and 8.0% of articles in Korea (Table 4).