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Table 1 Demographic and clinicopathological characteristics of 1239 IgAN patients and 497 patients matched by propensity score

From: Cigarette smoking may accelerate the progression of IgA nephropathy

Characteristics

Before PSM

After PSM

Non-smokers (1030)

Smokers (209)

Non-smokers (318)

Smokers (179)

Clinical

 Male (%)

351 (34.1)

203 (97.1) **

299 (94)

173 (96.6)

 Hypertension (%)

252 (24.5)

79 (37.8) **

98 (30.8)

64 (35.8)

 SBP (mmHg)

127.0 ± 18.2

127.6 ± 16.5

129.2 ± 17.4

128.2 ± 16.2

 DBP (mmHg)

83.0 ± 13.2

83.0 ± 13.4

84.9 ± 12.8

83.7 ± 13.1

 Serum creatinine (umol/L)

88.3 ± 41.3

116.6 ± 54.2 **

108.5 ± 49.3

115.8 ± 55.3

 eGFR (mL/min per 1.73m2)

93.8 ± 31.3

82.8 ± 33.7 **

90.7 ± 32.3

85.0 ± 34.3

 Urine protein (g/24 h)

2.1 ± 2.5

2.7 ± 3.0 **

2.3 ± 2.7

2.4 ± 2.6

Treatment

 Support treatment (%)

436 (42.3)

77 (36.8)

145 (45.6)

68 (38)

 Prednisone or other immunosuppressive agents (%)

594 (57.7)

132 (63.2)

173 (54.4)

111 (62)

Pathologic

Oxford Classification

   

 M1 (%)

774 (75.2)

116 (77)

243 (76.4)

137 (76.5)

 E1 (%)

47 (4.6)

12 (5.7)

9 (2.8)

9 (5)

 S1 (%)

623 (60.5)

130 (62.2)

189 (59.4)

115 (64.2)

 T1/T2 (%)

179 (17.4)

58 (27.8) **

79 (24.8)

51 (28.5)

 C1/C2 (%)

239 (23.2)

49 (23.4)

77 (24.2)

38 (21.2)

  1. Note: Values for categorical variables are given as number (percentage); values for continuous variables are given as mean ± standard deviation
  2. *stands for p < 0.05, ** stands for p < 0.01
  3. Abbreviations: SBP Systolic blood pressure, DBP Diastolic blood pressure, eGFR Estimated glomerular filtration rate, M Mesangial proliferation, E Endocapillary proliferation, S Segmental sclerosis, T Tubular atrophy/interstitial fibrosis, C Crescents, PSM Propensity-score matching method, IgAN Immunoglobulin A nephropathy