Indirect calorimetry in obese female subjects: Factors influencing the resting metabolic rate

Table 1 Anthropometric characteristics, clinical parametersand body composition

Variable	mean ± SD
Age (yr)	52.72 ± 13.96
BW1 (kg)	102.97 ± 26.55
BH1 (cm)	158.41 ± 6.71
BMI1 (kg/m2)	41.35 ± 11.37
WC1 (cm)	115.44 ± 22.08
HR1 (bpm)	66.61 ± 11.03
SBP1 (mmHg)	127.32 ± 18.06
DBP1 (mmHg)	78.04 ± 8.58
CB1 (cm)	39.01 ± 8.23
CMB1 (cm)	29.31 ± 5.27
FM12 (%)	42.86 ± 10.06
FM13 (%)	45.34 ± 28.07
FFM13 (%)	54.66 ± 28.07
MM13 (%)	32.16 ± 25.71
BCM13 (%)	44.49 ± 8.40
BCM1-Index3	8.91 ± 2.43
TBW13 (%)	41.06 ± 20.42
ECW13 (%)	52.56 ± 5.37
ICW13 (%)	47.44 ± 5.37
RMR1 (kcal/d)	1537.91 ± 281.76

Descriptive data in obese women.

¹See the full text for abbreviations of subjects’ anthropometric parameters;

²Estimated by Harpenden caliper;

³Estimated by BIA. BW: Body weight; BH: Body height; BMI: Body mass index; WC: Waist circumference; HR: Heart rate; FM: Fat mass; RMR: Resting metabolic rate.

Table 2 Parameters influencing resting metabolic rate (descriptive data)

Variable	Subjects (%)
T2DM	33.3
IGT	18.8
Hyperinsulinism	26.1
OSAS	17.4
Dysthyroidism	31.3
Dyslipidemia	13.0
Hypertension	65.2
Depression	27.5
Metformin	36.2
Antidepressants	18.8
Antihypertensive drugs	10.1
Levothyroxine	31.9
Smoking habit	43.8
Postmenopausal state	0

T2DM: Type 2 diabetes mellitus; IGT: Impaired glucose tolerance; OSAS: Obstructive sleep apnoea syndrome.

Table 3 Correlation analysis among subjects’ anthropometric parameters, body composition and resting metabolic rate (kJ/d) (n = 42)

Variables	Correlation (r)	P4
Age (yr)	0.006	0.969
BW1 (kg)	0.732	< 0.001
BH1 (cm)	0.401	0.008
BMI1 (kg/m2)	0.504	< 0.001
WC1 (cm)	0.602	< 0.001
MAC1 (cm)	0.417	0.006
MAMC1 (cm)	0.344	0.028
FM12 and FFM12 (%)	0.169	0.290
FM13 and FFM13 (%)	0.113	0.485
MM13 (%)	0.105	0.522
BCM13 (%)	0.033	0.837
BCM1-Index3	0.120	0.458
TBW13 (%)	0.339	0.035
ECW13 and ICW13 (%)	0.029	0.865

¹See the full text for abbreviations of subjects’ anthropometric parameters;

²Estimated by Harpenden caliper;

³Estimated by BIA. BW: Body weight; ⁴Differences and correlations were considered statistically significant when P value was < 0.05. BH: Body height; BMI: Body mass index; WC: Waist circumference; FM: Fat mass.

Table 4 Correlation of subjects’ physical characteristics with resting metabolic rate (n = 42)

Variables	Correlation (r)	P1
Blood pressure (mmHg) systolic/diastolic	0.048/0.035	0.759/0.825
Heart rate (b/min)	0.296	0.050
SpO2 (%)	0.158	0.318
Body temperature (°C)	0.409	0.007

¹Differences and correlations were considered statistically significant when P value was < 0.05.