Chinese General Practice ›› 2023, Vol. 26 ›› Issue (05): 550-556.DOI: 10.12114/j.issn.1007-9572.2022.0583
Special Issue: 呼吸疾病文章合辑; 新型冠状病毒肺炎最新文章合辑; COVID-19疫情防控研究
• Original Research • Previous Articles Next Articles
Received:
2022-06-11
Revised:
2022-09-22
Published:
2023-02-15
Online:
2022-10-08
Contact:
WANG Fengyan
通讯作者:
王凤燕
作者简介:
基金资助:
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URL: https://www.chinagp.net/EN/10.12114/j.issn.1007-9572.2022.0583
组别 | 例数 | 男性〔n(%)〕 | 年龄( | mMRC〔n(%)〕 | CAT〔M(P25,P75),分〕 | CAT〔n(%)〕 | FEV1%pred〔M(P25,P75),%〕 | |||
---|---|---|---|---|---|---|---|---|---|---|
0~1分 | 2~4分 | <10分 | ≥10分 | |||||||
Ⅳ组 | 159 | 153(96.2) | 66.8±8.0 | 83(52.2) | 76(47.8) | 10(6,13) | 77(48.4) | 82(51.6) | 45.1(33.3,63.2) | |
Ⅰ组 | 162 | 153(94.4) | 66.6±7.9 | 84(51.8) | 78(48.2) | 11(7,15) | 66(40.7) | 96(59.3) | 44.2(30.5,59.15) | |
检验统计量值 | 0.572a | 0.255b | 0.004a | -1.961 | 1.919a | -0.981 | ||||
P值 | 0.449 | 0.822 | 0.95 | 0.050 | 0.166 | 0.327 | ||||
Ⅳ组 | 159 | 153(96.2) | 66.8±8.0 | 83(52.2) | 76(47.8) | 10(6,13) | 77(48.4) | 82(51.6) | 45.1(33.3,63.2) | |
Ⅱ组 | 157 | 146(93.0) | 67.7±7.6 | 97(61.8) | 60(38.2) | 10(6.5,15) | 69(44.0) | 88(56.0) | 52.1(36.2,70.1) | |
检验统计量值 | 1.622a | -1.037b | 2.959a | -1.346 | 0.637a | -1.911 | ||||
P值 | 0.203 | 0.300 | 0.085 | 0.178 | 0.425 | 0.056 | ||||
Ⅳ组 | 159 | 153(96.2) | 66.8±8.0 | 83(52.2) | 76(47.8) | 10(6,13) | 77(48.4) | 82(51.6) | 45.1(33.3,63.2) | |
Ⅲ组 | 167 | 157(94.0) | 66.5±7.8 | 90(53.9) | 77(46.1) | 10(6,14) | 78(46.7) | 89(53.3) | 42.6(32.5,58.0) | |
检验统计量值 | 0.856a | 0.302b | 0.094a | -0.541 | 0.097a | -1.127 | ||||
P值 | 0.355 | 0.763 | 0.760 | 0.589 | 0.756 | 0.260 | ||||
组别 | FEV1%pred分级〔n(%)〕 | 吸烟史〔M(P25,P75),包/年〕 | 吸入用药史〔n(%)〕 | |||||||
<30% | [30%,50%) | [50%,80%) | ≥80% | ICS+LABA+LAMA | ICS+LABA | LABA+LAMA | LAMA | 其他 | ||
Ⅳ组 | 27(17.0) | 63(39.6) | 52(32.7) | 17(10.7) | 35(15,50) | 66(41.5) | 53(33.3) | 1(0.6) | 21(13.2) | 18(11.3) |
Ⅰ组 | 38(23.5) | 59(36.4) | 51(31.5) | 14(8.6) | 30(10,45) | 66(40.7) | 57(35.2) | 8(4.9) | 15(9.3) | 16(9.9) |
检验统计量值 | 2.084a | 0.349a | 0.055a | 0.386a | -1.136 | 0.020a | 0.122a | — | 1.256a | 0.177a |
P值 | 0.149 | 0.554 | 0.814 | 0.534 | 0.256 | 0.889 | 0.727 | 0.037 | 0.262 | 0.674 |
Ⅳ组 | 27(17.0) | 63(39.6) | 52(32.7) | 17(10.7) | 35(15,50) | 66(41.5) | 53(33.3) | 1(0.6) | 21(13.2) | 18(11.3) |
Ⅱ组 | 22(14.0) | 52(33.1) | 65(41.4) | 18(11.5) | 30(8,40) | 47(29.9) | 67(42.7) | 2(1.3) | 23(14.6) | 18(11.5) |
检验统计量值 | 0.531a | 1.443a | 2.563a | 0.048a | -2.210 | 4.606a | 2.927a | — | 0.137a | 0.002a |
P值 | 0.466 | 0.230 | 0.109 | 0.827 | 0.027 | 0.032 | 0.087 | 0.621 | 0.711 | 0.968 |
Ⅳ组 | 27(17.0) | 63(39.6) | 52(32.7) | 17(10.7) | 35(15,50) | 66(41.5) | 53(33.3) | 1(0.6) | 21(13.2) | 18(11.3) |
Ⅲ组 | 35(21.0) | 69(41.3) | 50(29.9) | 13(7.8) | 35(15,50) | 74(44.3) | 46(27.5) | 2(1.2) | 30(18.0) | 15(9.0) |
检验统计量值 | 0.836a | 0.097a | 0.289a | 0.824a | -0.164 | 0.261a | 1.291a | — | 1.396a | 0.490a |
P值 | 0.360 | 0.755 | 0.591 | 0.364 | 0.869 | 0.609 | 0.256 | 1.000 | 0.237 | 0.484 |
Table 1 Comparison of basic data of four groups of patients
组别 | 例数 | 男性〔n(%)〕 | 年龄( | mMRC〔n(%)〕 | CAT〔M(P25,P75),分〕 | CAT〔n(%)〕 | FEV1%pred〔M(P25,P75),%〕 | |||
---|---|---|---|---|---|---|---|---|---|---|
0~1分 | 2~4分 | <10分 | ≥10分 | |||||||
Ⅳ组 | 159 | 153(96.2) | 66.8±8.0 | 83(52.2) | 76(47.8) | 10(6,13) | 77(48.4) | 82(51.6) | 45.1(33.3,63.2) | |
Ⅰ组 | 162 | 153(94.4) | 66.6±7.9 | 84(51.8) | 78(48.2) | 11(7,15) | 66(40.7) | 96(59.3) | 44.2(30.5,59.15) | |
检验统计量值 | 0.572a | 0.255b | 0.004a | -1.961 | 1.919a | -0.981 | ||||
P值 | 0.449 | 0.822 | 0.95 | 0.050 | 0.166 | 0.327 | ||||
Ⅳ组 | 159 | 153(96.2) | 66.8±8.0 | 83(52.2) | 76(47.8) | 10(6,13) | 77(48.4) | 82(51.6) | 45.1(33.3,63.2) | |
Ⅱ组 | 157 | 146(93.0) | 67.7±7.6 | 97(61.8) | 60(38.2) | 10(6.5,15) | 69(44.0) | 88(56.0) | 52.1(36.2,70.1) | |
检验统计量值 | 1.622a | -1.037b | 2.959a | -1.346 | 0.637a | -1.911 | ||||
P值 | 0.203 | 0.300 | 0.085 | 0.178 | 0.425 | 0.056 | ||||
Ⅳ组 | 159 | 153(96.2) | 66.8±8.0 | 83(52.2) | 76(47.8) | 10(6,13) | 77(48.4) | 82(51.6) | 45.1(33.3,63.2) | |
Ⅲ组 | 167 | 157(94.0) | 66.5±7.8 | 90(53.9) | 77(46.1) | 10(6,14) | 78(46.7) | 89(53.3) | 42.6(32.5,58.0) | |
检验统计量值 | 0.856a | 0.302b | 0.094a | -0.541 | 0.097a | -1.127 | ||||
P值 | 0.355 | 0.763 | 0.760 | 0.589 | 0.756 | 0.260 | ||||
组别 | FEV1%pred分级〔n(%)〕 | 吸烟史〔M(P25,P75),包/年〕 | 吸入用药史〔n(%)〕 | |||||||
<30% | [30%,50%) | [50%,80%) | ≥80% | ICS+LABA+LAMA | ICS+LABA | LABA+LAMA | LAMA | 其他 | ||
Ⅳ组 | 27(17.0) | 63(39.6) | 52(32.7) | 17(10.7) | 35(15,50) | 66(41.5) | 53(33.3) | 1(0.6) | 21(13.2) | 18(11.3) |
Ⅰ组 | 38(23.5) | 59(36.4) | 51(31.5) | 14(8.6) | 30(10,45) | 66(40.7) | 57(35.2) | 8(4.9) | 15(9.3) | 16(9.9) |
检验统计量值 | 2.084a | 0.349a | 0.055a | 0.386a | -1.136 | 0.020a | 0.122a | — | 1.256a | 0.177a |
P值 | 0.149 | 0.554 | 0.814 | 0.534 | 0.256 | 0.889 | 0.727 | 0.037 | 0.262 | 0.674 |
Ⅳ组 | 27(17.0) | 63(39.6) | 52(32.7) | 17(10.7) | 35(15,50) | 66(41.5) | 53(33.3) | 1(0.6) | 21(13.2) | 18(11.3) |
Ⅱ组 | 22(14.0) | 52(33.1) | 65(41.4) | 18(11.5) | 30(8,40) | 47(29.9) | 67(42.7) | 2(1.3) | 23(14.6) | 18(11.5) |
检验统计量值 | 0.531a | 1.443a | 2.563a | 0.048a | -2.210 | 4.606a | 2.927a | — | 0.137a | 0.002a |
P值 | 0.466 | 0.230 | 0.109 | 0.827 | 0.027 | 0.032 | 0.087 | 0.621 | 0.711 | 0.968 |
Ⅳ组 | 27(17.0) | 63(39.6) | 52(32.7) | 17(10.7) | 35(15,50) | 66(41.5) | 53(33.3) | 1(0.6) | 21(13.2) | 18(11.3) |
Ⅲ组 | 35(21.0) | 69(41.3) | 50(29.9) | 13(7.8) | 35(15,50) | 74(44.3) | 46(27.5) | 2(1.2) | 30(18.0) | 15(9.0) |
检验统计量值 | 0.836a | 0.097a | 0.289a | 0.824a | -0.164 | 0.261a | 1.291a | — | 1.396a | 0.490a |
P值 | 0.360 | 0.755 | 0.591 | 0.364 | 0.869 | 0.609 | 0.256 | 1.000 | 0.237 | 0.484 |
组别 | 例数 | 10月至次年1月 | 2—5月 | Z值 | P值 |
---|---|---|---|---|---|
Ⅰ组 | 162 | 43(26.5) | 68(42.0) | -2.495 | 0.013 |
Ⅱ组 | 157 | 34(21.7) | 54(34.4) | -2.406 | 0.016 |
Ⅲ组 | 167 | 45(27.0) | 61(36.5) | -1.621 | 0.105 |
Ⅳ组 | 159 | 30(18.9) | 9(5.7) | -3.362 | 0.001 |
Table 2 Comparison of the frequency of acute exacerbation of COPD among four groups of patients in periods from October to January next year and from February to May
组别 | 例数 | 10月至次年1月 | 2—5月 | Z值 | P值 |
---|---|---|---|---|---|
Ⅰ组 | 162 | 43(26.5) | 68(42.0) | -2.495 | 0.013 |
Ⅱ组 | 157 | 34(21.7) | 54(34.4) | -2.406 | 0.016 |
Ⅲ组 | 167 | 45(27.0) | 61(36.5) | -1.621 | 0.105 |
Ⅳ组 | 159 | 30(18.9) | 9(5.7) | -3.362 | 0.001 |
组别 | 例数 | 10月 | 11月 | 12月 | 次年1月 | 次年2月 | 次年3月 | 次年4月 | 次年5月 | 10月至次年1月 | 次年2—5月 |
---|---|---|---|---|---|---|---|---|---|---|---|
Ⅳ组 | 159 | 11(6.9) | 7(4.4) | 7(4.4) | 5(3.1) | 1(0.6) | 3(1.9) | 0 | 5(3.1) | 30(18.9) | 9(5.7) |
Ⅰ组 | 162 | 6(3.7) | 7(4.3) | 12(7.4) | 18(11.1) | 14(8.6) | 16(9.9) | 18(11.1) | 20(12.4) | 43(26.5) | 68(42.0) |
χ2值 | 1.65 | 0.001 | 1.301 | 7.656 | 11.566 | 9.199 | 18.716 | 9.459 | 2.690 | 58.037 | |
P值 | 0.199 | 0.971 | 0.254 | 0.006 | 0.001 | 0.002 | <0.001 | 0.002 | 0.101 | <0.001 | |
Ⅳ组 | 159 | 11(6.9) | 7(4.4) | 7(4.4) | 5(3.1) | 1(0.6) | 3(1.9) | 0 | 5(3.1) | 30(18.9) | 9(5.7) |
Ⅱ组 | 157 | 6(3.8) | 5(3.2) | 11(7.0) | 12(7.6) | 13(8.3) | 18(11.5) | 10(6.4) | 13(8.3) | 34(21.0) | 54(34.4) |
χ2值 | 1.488 | 0.321 | 0.997 | 3.141 | 0.923 | 11.682 | 10.458 | 3.879 | 0.380 | 40.863 | |
P值 | 0.223 | 0.571 | 0.318 | 0.076 | 0.001 | 0.001 | 0.001 | 0.049 | 0.537 | <0.001 | |
Ⅳ组 | 159 | 11(6.9) | 7(4.4) | 7(4.4) | 5(3.1) | 1(0.6) | 3(1.9) | 0 | 5(3.1) | 30(18.9) | 9(5.7) |
Ⅲ组 | 167 | 7(4.2) | 10(6.0) | 6(3.6) | 22(13.2) | 12(7.2) | 21(12.6) | 16(9.6) | 12(7.2) | 45(27.0) | 61(36.5) |
χ2值 | 1.161 | 9.414 | 0.139 | 10.785 | 9.146 | 13.643 | 14.970 | 2.691 | 3.001 | 46.022 | |
P值 | 0.281 | 0.520 | 0.709 | 0.001 | 0.002 | <0.001 | <0.001 | 0.101 | 0.083 | <0.001 |
Table 3 Comparison of frequency of acute exacerbation of COPD between group 4 and the other three groups during the same period
组别 | 例数 | 10月 | 11月 | 12月 | 次年1月 | 次年2月 | 次年3月 | 次年4月 | 次年5月 | 10月至次年1月 | 次年2—5月 |
---|---|---|---|---|---|---|---|---|---|---|---|
Ⅳ组 | 159 | 11(6.9) | 7(4.4) | 7(4.4) | 5(3.1) | 1(0.6) | 3(1.9) | 0 | 5(3.1) | 30(18.9) | 9(5.7) |
Ⅰ组 | 162 | 6(3.7) | 7(4.3) | 12(7.4) | 18(11.1) | 14(8.6) | 16(9.9) | 18(11.1) | 20(12.4) | 43(26.5) | 68(42.0) |
χ2值 | 1.65 | 0.001 | 1.301 | 7.656 | 11.566 | 9.199 | 18.716 | 9.459 | 2.690 | 58.037 | |
P值 | 0.199 | 0.971 | 0.254 | 0.006 | 0.001 | 0.002 | <0.001 | 0.002 | 0.101 | <0.001 | |
Ⅳ组 | 159 | 11(6.9) | 7(4.4) | 7(4.4) | 5(3.1) | 1(0.6) | 3(1.9) | 0 | 5(3.1) | 30(18.9) | 9(5.7) |
Ⅱ组 | 157 | 6(3.8) | 5(3.2) | 11(7.0) | 12(7.6) | 13(8.3) | 18(11.5) | 10(6.4) | 13(8.3) | 34(21.0) | 54(34.4) |
χ2值 | 1.488 | 0.321 | 0.997 | 3.141 | 0.923 | 11.682 | 10.458 | 3.879 | 0.380 | 40.863 | |
P值 | 0.223 | 0.571 | 0.318 | 0.076 | 0.001 | 0.001 | 0.001 | 0.049 | 0.537 | <0.001 | |
Ⅳ组 | 159 | 11(6.9) | 7(4.4) | 7(4.4) | 5(3.1) | 1(0.6) | 3(1.9) | 0 | 5(3.1) | 30(18.9) | 9(5.7) |
Ⅲ组 | 167 | 7(4.2) | 10(6.0) | 6(3.6) | 22(13.2) | 12(7.2) | 21(12.6) | 16(9.6) | 12(7.2) | 45(27.0) | 61(36.5) |
χ2值 | 1.161 | 9.414 | 0.139 | 10.785 | 9.146 | 13.643 | 14.970 | 2.691 | 3.001 | 46.022 | |
P值 | 0.281 | 0.520 | 0.709 | 0.001 | 0.002 | <0.001 | <0.001 | 0.101 | 0.083 | <0.001 |
Figure 3 Temporal trends of the frequency of acute exacerbation of COPD without medical attention during eight months(from October to May next year)in four groups of patients
组别 | 例数 | 10月 | 11月 | 12月 | 次年1月 | 次年2月 | 次年3月 | 次年4月 | 次年5月 |
---|---|---|---|---|---|---|---|---|---|
Ⅳ组 | 159 | 1(0.6) | 3(1.9) | 2(1.3) | 1(0.6) | 0 | 2(1.3) | 0 | 0 |
Ⅰ组 | 162 | 1(0.6) | 3(1.8) | 1(0.6) | 2(1.2) | 1(0.6) | 3(1.8) | 4(2.5) | 3(1.8) |
χ2值 | — | — | — | — | — | — | — | — | |
P值 | 1.000 | 1.000 | 0.620 | 1.000 | 1.000 | 1.000 | 0.123 | 0.248 | |
Ⅳ组 | 159 | 1(0.6) | 3(1.9) | 2(1.3) | 1(0.6) | 0 | 2(1.3) | 0 | 0 |
Ⅱ组 | 157 | 1(0.6) | 0 | 2(1.3) | 4(2.6) | 3(1.9) | 0 | 3(1.9) | 5(3.2) |
χ2值 | — | — | — | — | — | — | — | — | |
P值 | 1.000 | 0.248 | 1.000 | 0.213 | 0.121 | 0.498 | 0.121 | 0.029 | |
Ⅳ组 | 159 | 1(0.6) | 3(1.9) | 2(1.3) | 1(0.6) | 0 | 2(1.3) | 0 | 0 |
Ⅲ组 | 167 | 1(0.6) | 1(0.6) | 1(0.6) | 0 | 3(1.8) | 2(1.2) | 4(2.4) | 1(0.6) |
χ2值 | — | — | — | — | — | — | — | — | |
P值 | 1.000 | 0.361 | 0.615 | 0.488 | 0.248 | 1.000 | 0.123 | 1.000 |
Table 4 Comparison on the frequency of acute exacerbations of COPD without medical attention during eight months(from October to May next year) among four groups
组别 | 例数 | 10月 | 11月 | 12月 | 次年1月 | 次年2月 | 次年3月 | 次年4月 | 次年5月 |
---|---|---|---|---|---|---|---|---|---|
Ⅳ组 | 159 | 1(0.6) | 3(1.9) | 2(1.3) | 1(0.6) | 0 | 2(1.3) | 0 | 0 |
Ⅰ组 | 162 | 1(0.6) | 3(1.8) | 1(0.6) | 2(1.2) | 1(0.6) | 3(1.8) | 4(2.5) | 3(1.8) |
χ2值 | — | — | — | — | — | — | — | — | |
P值 | 1.000 | 1.000 | 0.620 | 1.000 | 1.000 | 1.000 | 0.123 | 0.248 | |
Ⅳ组 | 159 | 1(0.6) | 3(1.9) | 2(1.3) | 1(0.6) | 0 | 2(1.3) | 0 | 0 |
Ⅱ组 | 157 | 1(0.6) | 0 | 2(1.3) | 4(2.6) | 3(1.9) | 0 | 3(1.9) | 5(3.2) |
χ2值 | — | — | — | — | — | — | — | — | |
P值 | 1.000 | 0.248 | 1.000 | 0.213 | 0.121 | 0.498 | 0.121 | 0.029 | |
Ⅳ组 | 159 | 1(0.6) | 3(1.9) | 2(1.3) | 1(0.6) | 0 | 2(1.3) | 0 | 0 |
Ⅲ组 | 167 | 1(0.6) | 1(0.6) | 1(0.6) | 0 | 3(1.8) | 2(1.2) | 4(2.4) | 1(0.6) |
χ2值 | — | — | — | — | — | — | — | — | |
P值 | 1.000 | 0.361 | 0.615 | 0.488 | 0.248 | 1.000 | 0.123 | 1.000 |
组别 | 例数 | 10月 | 11月 | 12月 | 次年1月 | 次年2月 | 次年3月 | 次年4月 | 次年5月 |
---|---|---|---|---|---|---|---|---|---|
Ⅳ组 | 159 | 10(6.3) | 4(2.5) | 5(3.1) | 4(2.5) | 1(0.6) | 1(0.6) | 0 | 5(3.1) |
Ⅰ组 | 162 | 5(3.1) | 4(2.5) | 11(6.8) | 16(9.9) | 13(8.0) | 13(8.0) | 14(8.6) | 16(9.9) |
χ2值 | 1.848 | — | 2.252 | 7.442 | 10.522 | 10.522 | 14.367 | 5.948 | |
P值 | 0.174 | 1.000 | 0.133 | 0.006 | 0.001 | 0.001 | <0.001 | 0.015 | |
Ⅳ组 | 159 | 10(6.3) | 4(2.5) | 5(3.1) | 4(2.5) | 1(0.6) | 1(0.6) | 0 | 5(3.1) |
Ⅱ组 | 157 | 5(3.2) | 4(2.6) | 9(5.7) | 8(5.1) | 10(6.4) | 18(11.5) | 7(4.5) | 8(5.1) |
χ2值 | 1.684 | — | 1.249 | 1.439 | 7.748 | 16.414 | 7.250 | 0.762 | |
P值 | 0.194 | 1.000 | 0.264 | 0.230 | 0.005 | <0.001 | 0.021 | 0.383 | |
Ⅳ组 | 159 | 10(6.3) | 4(2.5) | 5(3.1) | 4(2.5) | 1(0.6) | 1(0.6) | 0 | 5(3.1) |
Ⅲ组 | 167 | 6(3.6) | 9(5.4) | 5(3.0) | 22(13.2) | 9(5.4) | 19(11.4) | 12(7.2) | 11(6.6) |
χ2值 | 1.269 | 1.757 | — | 12.606 | — | 16.340 | 11.862 | 2.968 | |
P值 | 0.260 | 0.185 | 1.000 | <0.001 | 0.020 | <0.001 | 0.001 | 0.015 |
Table 5 Comparison of the frequency of visits for acute exacerbation of COPD during eight months(from October to May next year) among four groups of patients
组别 | 例数 | 10月 | 11月 | 12月 | 次年1月 | 次年2月 | 次年3月 | 次年4月 | 次年5月 |
---|---|---|---|---|---|---|---|---|---|
Ⅳ组 | 159 | 10(6.3) | 4(2.5) | 5(3.1) | 4(2.5) | 1(0.6) | 1(0.6) | 0 | 5(3.1) |
Ⅰ组 | 162 | 5(3.1) | 4(2.5) | 11(6.8) | 16(9.9) | 13(8.0) | 13(8.0) | 14(8.6) | 16(9.9) |
χ2值 | 1.848 | — | 2.252 | 7.442 | 10.522 | 10.522 | 14.367 | 5.948 | |
P值 | 0.174 | 1.000 | 0.133 | 0.006 | 0.001 | 0.001 | <0.001 | 0.015 | |
Ⅳ组 | 159 | 10(6.3) | 4(2.5) | 5(3.1) | 4(2.5) | 1(0.6) | 1(0.6) | 0 | 5(3.1) |
Ⅱ组 | 157 | 5(3.2) | 4(2.6) | 9(5.7) | 8(5.1) | 10(6.4) | 18(11.5) | 7(4.5) | 8(5.1) |
χ2值 | 1.684 | — | 1.249 | 1.439 | 7.748 | 16.414 | 7.250 | 0.762 | |
P值 | 0.194 | 1.000 | 0.264 | 0.230 | 0.005 | <0.001 | 0.021 | 0.383 | |
Ⅳ组 | 159 | 10(6.3) | 4(2.5) | 5(3.1) | 4(2.5) | 1(0.6) | 1(0.6) | 0 | 5(3.1) |
Ⅲ组 | 167 | 6(3.6) | 9(5.4) | 5(3.0) | 22(13.2) | 9(5.4) | 19(11.4) | 12(7.2) | 11(6.6) |
χ2值 | 1.269 | 1.757 | — | 12.606 | — | 16.340 | 11.862 | 2.968 | |
P值 | 0.260 | 0.185 | 1.000 | <0.001 | 0.020 | <0.001 | 0.001 | 0.015 |
Figure 4 Temporal trends of the frequency of visits for acute exacerbation of COPD during eight months(from October to May next year) in four groups of patients
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