Table 1 Baseline characteristics of study population

From: Association between exposure to particulate matter and heart rate variability in vulnerable and susceptible individuals

  

Chronic Disease Groups

Control Groups

Total

Arrhythmia

Chronic Airway Disease

Stroke

Higher Air Pollution Exposed

Older People

(N = 97)

(N = 19)

(N = 20)

(N = 20)

(N = 19)

(N = 19)

Sex (male)

59 (60.82)

13 (68.42)

17 (85.00)

13 (65.00)

7 (36.84)

9 (47.97)

Age (year)

65.52 (12.04)

65.42 (9.72)

59.55 (16.38)

62.15 (12.40)

69.53 (10.47)

71.42 (4.25)

BMI (kg/m2)

24.50 (3.67)

25.65 (2.61)

23.78 (2.56)

24.58 (2.72)

25.63 (3.31)

22.91 (5.76)

Smoking (yes)

11 (11.34)

2 (10.53)

2 (10.00)

1 (5.00)

4 (21.05)

2 (10.53)

Alcohol consumption (yes)

46 (47.42)

8 (42.11)

11 (55.00)

7 (35.00)

11 (57.89)

9 (47.37)

METs

160.81 (100.18)

208.03 (135.87)

162.47 (106.51)

122.55 (101.45)

155.34 (66.57)

157.59 (61.37)

Hypertension (yes)

52 (53.61)

12 (63.16)

9 (45.00)

16 (80.00)

9 (47.37)

6 (31.58)

Diabetes mellitus (yes)

18 (18.56)

4 (21.05)

0 (0.00)

7 (35.00)

3 (15.79)

4 (21.05)

PM1.0 (\({\rm{\mu }}{\rm{g}}/{m}^{3}\))

Mean (SD)

9.89 (9.78)

10.45 (11.46)

7.95 (4.55)

10.19 (13.11)

13.62 (11.49)

7.33 (2.73)

Median (q1, q3)

6.96 (4.68, 10.79)

7.37 (3.23, 12.30)

6.60 (4.67, 9.96)

6.73 (5.27, 9.74)

9.78 (6.13, 15.49)

6.72 (5.39, 8.68)

PM2.5 (\({\rm{\mu }}{\rm{g}}/{m}^{3}\))

Mean (SD)

10.46 (10.36)

10.94 (12.11)

8.44 (4.80)

10.77 (13.79)

14.51 (12.28)

7.72 (2.84)

Median (q1, q3)

7.36 (4.98, 11.35)

7.50 (3.31, 13.00)

7.04 (4.92, 10.48)

7.07 (5.75, 10.25)

10.34 (6.44, 16.45)

7.21 (5.67, 8.86)

PM10 (\({\rm{\mu }}{\rm{g}}/{m}^{3}\))

Mean (SD)

10.53 (10.44)

11.03 (12.11)

8.48 (4.83)

10.80 (13.86)

14.68 (12.51)

7.75 (2.86)

Median (q1, q3)

7.40 (5.00, 11.35)

7.64 (3.33, 13.03)

7.06 (4.94, 10.49)

7.07 (5.76, 10.27)

10.39 (6.45, 16.62)

7.27 (5.68, 8.92)

TVOC (\({\rm{\mu }}{\rm{g}}/{m}^{3}\))

Mean (SD)

340.92 (340.40)

258.73 (168.78)

361.02 (281.28)

407.70 (467.68)

375.10 (429.19)

297.47 (249.85)

Median (q1, q3)

238.28 (130.10, 424.59)

230.09 (142.47, 311.09)

308.74 (149.74, 443.92)

222.38 (127.13, 512.48)

206.11 (112.55, 491.56)

233.86 (112.48, 381.27)

CO2 (ppm)

Mean (SD)

650.19 (272.35)

554.08 (220.67)

671.55 (187.44)

595.58 (298.00)

837.49 (326.78)

592.95 (219.79)

Median (q1, q3)

615.94 (448.91, 777.40)

495.21 (407.30, 694.08)

624.54 (541.39, 764.96)

472.40 (390.76, 720.93)

758.29 (653.14, 850.40)

521.15 (409.82, 739.18)

Temperature (°C)

Mean (SD)

26.80 (3.47)

29.57 (3.84)

26.23 (2.00)

26.71 (2.76)

23.49 (3.18)

28.05 (2.15)

Median (q1, q3)

26.99 (24.67, 29.08)

29.71 (27.99, 30.99)

26.34 (24.60, 28.02)

26.59 (24.49, 28.68)

24.28 (20.80, 25.51)

28.31 (26.73, 29.86)

Humidity (\({\rm{g}}/{m}^{3}\))

Mean (SD)

40.83 (13.25)

50.23 (13.25)

38.14 (8.93)

43.32 (11.05)

26.60 (6.28)

45.86 (12.18)

Median (q1, q3)

38.89 (30.89, 49.94)

47.94 (45.07, 54.32)

35.60 (31.30)

43.38 (34.72, 51.14)

28.31 (21.45, 31.22)

45.75 (34.62, 53.35)

Respiration Rate

13.97 (3.01)

14.88 (3.62)

14.11 (1.31)

13.74 (0.92)

12.88 (1.11)

14.23 (5.29)

Heart rate

75.39 (9.94)

76.44 (12.96)

78.01 (8.48)

77.45 (8.95)

73.97 (9.88)

70.84 (7.29)

Heart rate variability

SDNN

Mean (SD)

138.96 (63.06)

118.16 (52.99)

122.78 (50.29)

146.49 (60.35)

144.57 (77.11)

163.24 (63.71)

Median (q1, q3)

129.80 (91.68, 171.69)

108.88 (80.13, 157.20)

111.62 (83.90, 154.50)

137.14 (107.87, 174.51)

139.00 (82.96, 192.99)

152.66 (122.06, 200.06)

SDANN

Mean (SD)

98.25 (39.36)

85.98 (38.82)

89.66 (32.33)

95.84 (33.70)

108.63 (54.19)

111.72 (28.29)

Median (q1, q3)

94.17 (72.32, 119.61)

85.37 (59.34, 103.34)

90.74 (67.95, 113.94)

94.97 (68.88, 120.50)

95.38 (75.11, 134.31)

108.31 (89.21, 132.54)

SDNNI

Mean (SD)

68.01 (41.11)

59.96 (45.23)

61.79 (38.07)

77.92 (54.42)

72.23 (31.47)

67.94 (29.93)

Median (q1, q3)

57.16 (38.43, 84.91)

38.70 (29.36, 83.79)

46.98 (37.19, 76.93)

59.73 (42.92, 99.65)

63.89 (53.89, 83.56)

61.18 (44.40, 93.84)

RMSSD

Mean (SD)

77.37 (66.07)

73.14 (66.05)

63.33 (61.03)

87.62 (82.46)

78.62 (59.55)

84.33 (58.08)

Median (q1, q3)

48.63 (26.16, 118.20)

41.93 (21.58, 113.91)

34.66 (21.12, 91.94)

42.14 (26.31, 151.10)

62.27 (28.82, 103.34)

77.29 (29.28, 122.35)

  1. Data are presented by n (%) or means (sd).
  2. SBP systolic blood pressure, DBP diastolic blood pressure, METs metabolic equivalent of task, TVOC total volatile organic compounds, PM particulate matter, SDNN standard deviation of NN intervals, SDANN standard deviation of the average NN intervals for each 5 min segment of a 24 h HRV recording, SDNNI mean of the standard deviations of all the NN intervals for each 5 min segment of a 24 h HRV recording, NN normal-to-normal, RMSSD root mean square of successive RR interval differences, RR The time between successive R waves in an electrocardiogram (ECG), representing one cardiac cycle.