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This report presents dietary intake estimates for selected B-vitamins, carotenes, and vitamins A, C, and E from the National Health and Nutrition Examination Survey, 1999-2000, for the U.S. population. Vitamin intakes are estimated from one 24-hour dietary recall interview. Population means, medians, and standard errors of the mean are weighted to produce national estimates, and are presented by sex and age groups. Assessment of dietary intakes is an important part of monitoring the nutritional status of the U.S. population.

Objective: This report describes ambulatory care visits made to physician offices in the United States. Statistics are presented on selected characteristics of the physician's practice, the patient, and the visit. Results highlighting new items on continuity of care are presented. They include whether the visit was the first or a followup for a problem, number of visits to this provider in the past 12 months for established patients, and whether other physicians shared care for the patient's problem. The report also highlights estimates of practice characteristics for office-based physicians.

Methods: The data presented in this report were collected from the 2001 National Ambulatory Medical Care Survey (NAMCS). NAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization by various types of providers. NAMCS is a national probability sample survey of visits to office-based physicians in the United States. Sample data are weighted to produce annual national estimates. Selected trends from the 1992 and 1997 NAMCS are also presented.

Results: During 2001, an estimated 880.5 million visits were made to physician offices in the United States, an overall rate of 314.4 visits per 100 persons. From 1992 through 2001, the visit rate for persons 45 years of age and over increased by 17%, from 407.3 to 478.2 visits per 100 persons. The mean age of patients at each office visit has steadily increased from 1992 through 2001 as has the mean number of diagnoses rendered and the overall drug mention rate. The visit rate to physician offices in metropolitan statistical areas (MSAs) (338.3 visits per 100 persons) was significantly larger than the rate in non-MSAs (218.0 visits per 100 persons). Females had a higher visit rate compared with males, and white persons had a higher rate than black or African-American persons. Half of all office visits were to the patient's primary care physician (PCP). Of the visits to physicians other than the patient's PCP, about one-third (32.6 percent) were referrals. About 1 in 10 office visits were made by new patients (11.8 percent), down 20% since 1992. More than one physician shared the care for the patient's condition at about one-fifth of the office visits. Of all visits made to offices in 2001, 58.8 percent listed private insurance as the primary expected source of payment, followed by Medicare (21.8 percent) and Medicaid and/or State Children's Health Insurance Program (7.2 percent). For preventive care visits, the female visit rate was over 75% higher than the rate for males (67.1 versus 37.7 visits per 100 persons). Essential hypertension, arthropathies, acute upper respiratory infection, and diabetes mellitus were the leading illness-related primary diagnoses. There were an estimated 99.8 million injury-related visits in 2001, or 35.6 visits per 100 persons. Diagnostic and screening services were o

Objectives: This report describes ambulatory care visits to hospital outpatient departments (OPDs) in the United States. Statistics are presented on selected hospital, clinic, patient, and visit characteristics. The report highlights new items on continuity of care of OPD visits, including: whether the visit was the first or a followup for a problem, number of visits to the clinic during the past 12 months for established patients, and whether other physicians shared care for the patient's problem. The report also highlights variation in utilization across the major types of OPD clinics surveyed.

Methods: The data presented in this report were collected from the 2001 National Hospital Ambulatory Medical Care Survey (NHAMCS). NHAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization across various types of providers. NHAMCS is a national probability sample survey of visits to emergency and outpatient departments of non-Federal, short-stay, and general hospitals in the United States. Sample data are weighted to produce annual national estimates.

Results: During 2001, about 83.7 million visits were made to hospital OPDs in the United States. The 2001 rate (29.9 per 100 persons) represents a 33 percent increase since 1992. Females had higher OPD visit rates than males (35.2 versus 24.3 visits per 100 persons) and black or African-American persons had higher OPD visit rates than white persons (48.8 versus 27.9 visits per 100 persons). The majority of visits to hospital OPDs were made by patients with previous visits to the clinic (84.2 percent); 70.0 percent had visited the clinic one or more times during the past 12 months. Preventive care visits comprised 15.5 percent of all OPD visits; nearly three out of four preventive care visits were made by females (72.8 percent). Diagnostic and screening services were ordered or provided at 85.0 percent of visits, therapeutic and preventive services were ordered or provided at 45.6 percent of visits, and medications were prescribed at 64.6 percent of visits. Most patients were given an appointment to return to the clinic (60.1 percent).

Objective: This report describes national estimates of dental care service utilization and unmet dental care needs due to cost for six Asian ethnic subgroups and the native Hawaiian or other Pacific Islander (NHOPI) population.

Methods: Combined data from the 1997-2000 National Health Interview Surveys (NHISs), conducted by the Centers for Disease Control's National Center for Health Statistics, were analyzed to produce estimates for Asians and NHOPIs aged 2 years and over. Information on dental care service utilization and unmet dental care needs due to cost was self-reported by persons aged 18 years and over. For children aged 2-17 years, the information was collected from an adult who was knowledgeable about the child's health.

Results: Approximately 64% of Asian and 56% NHOPI persons had visited a dentist at least once in the past year. Utilization of dental care services, however, varies significantly by ethnic subgroup. Asian Indians were most likely to have never had a dental visit and the NHOPIs were most likely to experience unmet dental care needs in the past year. Among adults, Japanese Americans (68.2%) were most likely and NHOPIs (49.3%) were least likely to have had a dental visit in the past year. Underutilization of dental care services was most prevalent among Asian adults with poor or near poor poverty status, without health insurance coverage, and who had resided in the United States for less than 5 years. Among children, NHOPIs (82.0%) were most likely and Asian Indians (60.1%) were least likely to have had a dental visit in the past year. Underutilization was most prevalent among Asian children who were not living with their parents or living with a single parent, who had no insurance coverage, who had poor or near poor poverty status, and whose parents had less than 12 years of education.

Conclusions: Utilization of dental care services and unmet dental care needs due to cost vary among the Asian ethnic subgroups and the NHOPI population.

Objectives: This report describes ambulatory care visits to hospital emergency departments (EDs) in the United States. Statistics are presented on selected hospital, patient, and visit characteristics. Selected trends in ED utilization from 1992 through 2001 are also presented. The report highlights new items on the continuity of care provided at ED visits, initial vital sign measurements, whether the patient's residence was a nursing home or institution, and duration of the ED visit.

Methods: The data presented in this report were collected from the 2001 National Hospital Ambulatory Medical Care Survey (NHAMCS). NHAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization across various types of providers. NHAMCS is a national probability sample survey of visits to emergency and outpatient departments of non-Federal, short-stay, and general hospitals in the United States. Sample data are weighted to produce annual national estimates.

Results: During 2001, an estimated 107.5 million visits were made to hospital EDs, about 38.4 visits per 100 persons. From 1992 through 2001, an increasing trend in the ED utilization rate was observed. Between 2 and 3 percent of ED visits were made by patients living in a nursing home or other institution. At approximately 3 percent of visits, the patient had been seen in the ED within the last 72 hours. In 2001, abdominal pain, chest pain, fever, and headache were the leading patient complaints accounting for nearly one-fifth of all visits. Acute upper respiratory infection was the leading illness-related diagnosis at ED visits. There were an estimated 39.4 million injury-related visits during 2001, or 14.1 visits per 100 persons. Diagnostic/screening services and procedures were provided at 85.4 percent and 40.9 percent of visits, respectively. Medications were provided at 74.2 percent of visits, and pain relief drugs accounted for 34.2 percent of the medications mentioned. In 2001, approximately 12 percent of ED visits resulted in hospital admission. On average, patients spent 3.0 hours in the ED.

This report presents dietary intake estimates of 10 nutrients for the U.S. population by sex and age groups. Nutrient intakes are estimated from one 24-hour dietary recall interview conducted in the National Health and Nutrition Examination Survey, 1999-2000. Population means, medians, and standard errors of the mean are weighted to produce national estimates. Assessment of dietary intakes is an important part of monitoring the nutritional status of the U.S. population.

Objective: This report presents estimates for underweight, healthy weight, overweight, and obesity for U.S. adults aged 18 years and over. Based on self-reported height and weight, data are shown for selected population subgroups for both sexes and for men and women separately.

Methods: Body weight status of U.S. adults was estimated using data from the 1997-98 National Health Interview Survey (NHIS) for 68,556 adults aged 18 years and over and Body Mass Index (BMI) (weight/height2) criteria established by the World Health Organization (WHO). The NHIS is administered in households throughout the United States using computer-assisted personal interviews (CAPI). The combined overall response rate in 1997-98 was 77.2%. Statistics shown in this report were age adjusted to the 2000 projected U.S. population.

Findings: Over one-half of adults (54.7%) were overweight and 1 in 5 (19.5%) were obese in 1997-98. Women (49.5%) were more likely than men (36.3%) to be of healthy weight although men and women were equally likely to be obese. Obesity was most prevalent among middle-aged adults, among black non-Hispanic adults and Hispanic adults, and among adults with less education and lower income. Rates of obesity by marital status differed by gender: married men (20.4%) had higher rates of obesity than separated and divorced men (16.8%), and married women (18.4%) had lower rates of obesity than separated and divorced women (23.2%). Obesity was lowest among adults living in the West and those living in a metropolitan statistical area (MSA), but outside the central city (i.e., the suburbs).

Conclusions: Overweight and obesity were widespread in the United States in 1997-98 and prevalence varied significantly by population subgroup.

Unlabelled: OBJECTIVES; This report presents national estimates of the use of non-Federal short-stay hospitals in the United States during 2000. Numbers and rates of discharges, diagnoses, and procedures are shown by age and sex. Discharges are also shown by geographic region of hospital. Average lengths of stay are presented for all discharges and for selected diagnostic categories by age and by sex. Trend data for selected variables are also provided.

Methods: The estimates are based on medical abstract data collected through the National Hospital Discharge Survey for 2000. The survey has been conducted annually by the National Center for Health Statistics since 1965. Diagnoses and procedures presented are coded according to the International Classification of Diseases, 9th Revision, Clinical Modification, or ICD-9-CM.

Results: Trends in the utilization of non-Federal short-stay hospitals show that the rate of hospitalization of the elderly (those 65 years of age and over) increased over the entire period from 1970 to 2000, despite a decrease in the 1980s. The rates for the other age groups declined overall. In 2000, there were an estimated 31.7 million discharges of inpatients, excluding newborn infants, from non-Federal short-stay hospitals in the United States. The discharge rate was 1,140.1 per 10,000 population and the average length of stay was 4.9 days. There were 40 million procedures performed on hospital inpatients during 2000. Males had more cardiovascular procedures than females (3.4 million versus 2.5 million), while females had more operations on the digestive system than males (3.0 million versus 2.2 million). About one-quarter of all procedures performed on females were obstetrical.

Objective: This report describes ambulatory care visits made to physician offices within the United States. Statistics are presented on selected characteristics of the physician's practice, the patient, and the visit. Highlights of trends in physician office visit utilization from 1997 through 2000 are also presented.

Method: The data presented in this report were collected from the 2000 National Ambulatory Medical Care Survey (NAMCS). NAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization across various types of providers. NAMCS is a national probability sample survey of visits to office-based physicians in the United States. Sample data are weighted to produce annual national estimates. Trends are based on NAMCS data from 1997 through 2000.

Results: During 2000, an estimated 823.5 million visits were made to physician offices in the United States, an overall rate of 300.4 visits per 100 persons. Approximately half of the visits were made to the patient's primary care physician. The proportion of office visits where a physician or physician group was the owner of the practice has steadily increased since 1997 (74.3 percent in 1997 versus 88.1 percent in 2000). Of all visits made to these offices in 2000, approximately 57 percent listed private insurance as the primary expected source of payment, and 29 percent were made by patients belonging to a health maintenance organization. There were an estimated 89.9 million injury-related visits during 2000, or 32.8 visits per 100 persons. Blood pressure check was the leading diagnostic screening test (45.3 percent) and males were more likely than females to have no diagnostic or screening services mentioned. The proportion of visits with at least one prescription for cardiovascular-renal drugs, hormones, or metabolic/nutrient drugs has increased since 1997.

Objectives: This report describes ambulatory care visits to hospital outpatient departments (OPDs) in the United States. Statistics are presented on selected hospital, clinic, patient, and visit characteristics. Highlights of trends in OPD utilization from 1997 through 2000 are also presented.

Methods: The data presented in this report were collected from the 2000 National Hospital Ambulatory Medical Care Survey (NHAMCS). NHAMCS is part of the ambulatory care component of the National Health Care Survey that measures health care utilization across various types of providers. NHAMCS is a national probability sample survey of visits to emergency and outpatient departments of non-Federal, short-stay, and general hospitals in the United States. Sample data are weighted to produce annual national estimates. Trends are based on NHAMCS data from 1997 through 2000.

Results: During 2000, an estimated 83.3 million visits were made to hospital OPDs in the United States, about 30.4 visits per 100 persons. Females had higher OPD visit rates than males (35.3 versus 25.2 visits per 100 persons). The OPD utilization rate for black persons was higher than for white persons (48.3 versus 28.0 visits per 100 persons). Of all visits made to hospital OPDs in 2000, private insurance (38.5 percent), Medicaid (22.1 percent), and Medicare (16.9 percent) were listed as the leading primary expected source of payment. Approximately 21 percent of OPD visits reported that patients belonged to an HMO. There were an estimated 9.5 million injury-related OPD visits in 2000. Since 1997, the percent of OPD visits that were for injuries increased by 24% (from 9.2 percent to 1.4 percent). Most of these visits were for unintentional injuries (57.6 percent), including those caused by falls (12.9 percent). Medications were prescribed at 64.0 percent of visits. On average, 1.6 medications were ordered at each OPD visit. In 2000, patients saw one or more physicians (i.e., staff physician, resident/intern, or other physician) at approximately 79 percent of visits. Most patients were given an appointment to return to the clinic (57.2 percent).