Rationale and design of the cardiorespiratory fitness and hospitalization events in armed forces study in Eastern Taiwan

Table 1 Baseline demographics, hemodynamics, medical and family history, and habit of exercise of men and women in the cardiorespiratory fitness and hospitalization events in armed forces study

	Men(n = 3669)	Women(n = 411)
Age (yr)	29.3 ± 5.9	28.1 ± 6.5
Specialty (%)
Air force	28	23.6
Army	50.5	61.6
Navy	21.5	14.8
Height (cm)	171.8 ± 5.8	160.5 ± 4.4
Weight (kg)	73.5 ± 10.2	58.1 ± 8.1
Body mass index (kg/m2)	24.9 ± 3.1	22.5 ± 2.9
Waist circumference (cm)	83.4 ± 8.0	73.3 ± 7.4
Pulse rate (times/min)	72.2 ± 10.8	75.7 ± 10.1
Systolic blood pressure (mmHg)	118.4 ± 13.1	106.5 ± 12.4
Diastolic blood pressure (mmHg)	70.6 ± 10.1	65.2 ± 9.1
Current smoking (%)	38.1	12.2
Current alcohol intake (%)	44.7	17.1
Current betel chewing (%)	12	1.2
Medical history (%)
Hypertension	1.5	0.2
Symptomatic arrhythmia	1.1	1.7
Chronic hepatitis B	3.4	1.7
Family history of cardiovascular disease within 3rd relatives (%)	3.4	4.6
Frequency of exercise (%)
Never or occasionally	19.7	30.5
1-2 times/wk	38.2	42.9
Over 3-5 times/wk	42.2	26.6
Cardiopulmonary distress symptoms related to exercise (%)	8.9	15.4

Data were presented as the mean ± SD and percentage (%).

Table 2 Baseline laboratory and electrocardiographic findings of men and women in the cardiorespiratory fitness and hospitalization events in armed forces study

	Men(n = 3669)	Women(n = 411)
Blood routine
Hemoglobin (g/dL)	15.2 ± 1.0	13.0 ± 1.0
Mean corpuscular volume (fl)	85.1 ± 6.3	85.2 ± 6.8
RBC count (106/μL)	5.3 ± 0.5	4.7 ± 0.4
WBC count (103/μL)	6.8 ± 1.7	6.6 ± 1.7
Platelet count (103/μL)	252.9 ± 50.5	274.5 ± 53.1
Blood biochemistry
Fasting glucose (mg/dL)	93.6 ± 13.4	89.1 ± 7.5
Total cholesterol (mg/dL)	174.4 ± 34.0	167.4 ± 29.1
LDL-cholesterol (mg/dL)	106.0 ± 29.7	93.5 ± 25.3
HDL-cholesterol (mg/dL)	47.9 ± 9.8	56.9 ± 11.0
Triglycerides (mg/dL)	115.1 ± 100.3	77.7 ± 38.9
BUN (mg/dL)	12.9 ± 2.8	10.7 ± 2.4
Creatinine (mg/dL)	1.0 ± 0.1	0.7 ± 0.1
eGFR (mL/min per 1.73 m2)	99.8 ± 14.2	109.4 ± 18.4
Uric acid (mg/dL)	6.7 ± 1.3	4.7 ± 0.9
AST (U/L)	20.7 ± 8.9	16.2 ± 5.2
ALT (U/L)	23.1 ± 17.7	12.5 ± 7.3
Urinalysis (%)
Protein > 1+	10.3	10.5
RBC > 1+	5.3	17.4
Occult blood > 1+	3.4	17.8
WBC > 6-10	2.1	11.2
Bacteria > 1+	2.6	22.4
12-lead electrocardiography (%)
LVH/RVH/IVCD	17.3/1.0/0.2	2.0/0.2/0
LAE/RAE	0.2/0.2	0.2/0
ICRBBB/CRBBB	3.9/0.5	0.73/0
LAFB/LPFB	0.7/0.2	0/0
1st degree atrioventricular block	3.8	3.4
PACs/PVCs	0.4/0.6	0.2/0.2

Data were presented as the mean ± SD and percentage (%). ALT: Alanine transaminase; AST: Aspartate transaminase; BUN: Blood urea nitrogen; CHIEF: Cardiopulmonary fitness and hospitalization events in armed forces; CRBBB: Complete right bundle branch block; eGFR: Estimated glomerular filtration rate; HDL: High-density lipoprotein; ICRBBB: Incomplete complete right bundle branch block; IVCD: Intraventricular conduction delay; LAE: Left atrial enlargement; LAFB: Left anterior fascicular block; LPFB: Left posterior fascicular block; LDL: Low-density lipoprotein; LVH: Left ventricular ventricular hypertrophy; PACs: Premature atrial contractures; PVCs: Premature ventricular contractures; RAE: Right atrial enlargement; RBC: Red blood cell; RVH: Right ventricular hypertrophy; WBC: White blood cell.

Table 3 Brief symptom rating score of men and women in the cardiorespiratory fitness and hospitalization events in armed forces study

	Men(n = 3669)	Women(n = 411)
Anxiety (%)
None (0)	69.52	59.72
Mild (1)	25.1	32.2
Moderate (2)	4.7	7.6
Severe (3)	0.4	0.2
Extremely severe (4)	0.3	0.2
Depression (%)
None (0)	72	63.2
Mild (1)	23	28.1
Moderate (2)	4.1	7.8
Severe (3)	0.7	0.7
Extremely severe (4)	0.3	0.2
Hostility (%)
None (0)	65.7	55.1
Mild (1)	27.3	33.9
Moderate (2)	5.8	9.8
Severe (3)	0.9	0.7
Extremely severe (4)	0.3	0.5
Insomnia (%)
None (0)	63.5	58.8
Mild (1)	28	29.5
Moderate (2)	6.7	9.5
Severe (3)	1.4	1.2
Extremely severe (4)	0.4	1
Interpersonal hypersensitivity: Inferiority (%)
None (0)	79.3	73,2
Mild (1)	16.5	21
Moderate (2)	4	5
Severe (3)	0.5	0.2
Extremely severe (4)	0.2	1
Suicide ideation (%)
None (0)	96.4	95
Mild (1)	2.4	3.7
Moderate (2)	0.6	1.5
Severe (3)	0.4	0
Extremely severe (4)	0.3	0

Data were presented as percentage (%).

Table 4 Exercise performances of men and women in the cardiorespiratory fitness and hospitalization events in armed forces study

	Men		Women
	n	Performance	n	Performance
2-min sit-up	3651	47.5 ± 8.2	408	37.7 ± 8.1
2-min push-up	3641	49.1 ± 11.7	391	33.9 ± 10.6
3000-m non-weight bearing running (s)	3296	859.9 ± 72.7	320	1007.1 ± 76.9

Data were presented as the mean ± SD.