Development of a shortened version of the chronic hepatitis B virus infection-related stigma scale
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摘要:
目的 研制并评价慢性HBV感染者歧视测量量表(the chronic hepatitis B virus infection-related stigma scale, HBVSS)简化版。 方法 通过便利抽样的方法选取1 058名慢性HBV感染者进行调查,随机抽取其中529名被试对象作为训练样本,用经典测量理论和项目反应理论的方法进行条目筛选;剩下529名被试对象作为考核样本,用于评价简化版量表的心理测量学特性。 结果 每个维度保留了2个较优的条目(感知的羞辱维度保留了4个条目),形成12条目的简化版量表(HBVSS-12)。HBVSS-12 Cronbach's α系数为0.903,各维度Cronbach's α系数介于0.670~0.856之间;验证性因子分析拟合度指标为:标准化残差均方和平方根=0.038,近似误差均方根=0.074,比较拟合指数=0.958,非规准适配指标=0.937;项目反应理论分析显示各条目区分度介于1.22~2.71之间,难度参数介于-3.24~3.15之间,条目平均信息量介于0.413~1.711之间。与原量表相比,HBVSS-12的各维度仍能保留56.23%~82.72%的信息量,总量表保留了73.20%的信息量。 结论 HBVSS-12具有良好的信度、效度和项目质量,可以作为慢性HBV感染相关歧视研究的简单有效工具。 Abstract:Objective To develop and evaluate a shortened version of the chronic hepatitis B virus infection-related stigma scale (HBVSS). Methods A total of 1 058 people with chronic HBV-infections were administered by convenient sampling method in this study. The data of 529 subjects were randomly selected as a training sample for item screening by classical test theory and item response theory (IRT). The data of the remaining 529 subjects were used as a validation sample to evaluate the psychometric properties of the shortened version scale. Results 2 better items remained within each dimension (perceived stigma dimension remained 4 items) of the original HBVSS, a shortened version HBVSS-12 was formed. Cronbach'α of HBVSS-12 was 0.670-0.856 for each dimension and 0.903 for the total scale. Confirmatory factor analysis showed acceptable goodness-of-fit (standardized root mean square residual=0.038, root mean square error of approximation=0.074, comparative fit index=0.958 and Tucker-Lewis index=0.937). IRT discrimination parameters were estimated to be 1.22-2.71 and difficulty parameters, -3.24-3.15. Average item information ranged from 0.413-1.711. Compared with the original scale, the average information of HBVSS-12 was reserved from 56.23%-82.72% for each dimension and 73.20% for the total scale. Conclusion The HBVSS-12 showed good reliability, validity, and item quality, making it simple and effective for assessing chronic HBV infection-related stigma. -
Key words:
- Chronic viral hepatitis B /
- Stigma /
- Item response theory /
- Item screening /
- Shortened version
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表 1 训练样本和考核样本的统计描述及对比结果[n(%)]
Table 1. Descriptive statistics and comparison results of training and validation sample [n(%)]
基本特征 训练样本
(n=529)考核样本
(n=529)t/χ2/W值 P值 基本特征 训练样本
(n=529)考核样本
(n=529)t/χ2/W值 P值 年龄(x±s, 岁) 34.07±8.98 33.85±9.34 0.389 0.697 诊断 0.534 0.766 年龄组(岁) 0.100 0.752 无症状病毒携带者 40(7.7) 37(7.2) 18~<36 323(61.1) 328(62.0) 慢性乙肝 414(79.3) 405(78.3) ≥36~60 206(38.9) 201(38.0) 乙肝肝硬化 68(13.0) 75(14.5) 性别 0.498 0.481 病情 269 412 0.675 男 433(81.9) 424(80.2) 轻度 310(59.0) 313(60.3) 女 96(18.1) 105(19.8) 中度 178(33.9) 171(32.9) 文化程度 0.642 0.423 重度 37(7.0) 35(6.7) 高中及以下 275(52.0) 288(54.4) 居住地 0.851 0.356 高中以上 254(48.0) 241(45.6) 城市/城镇 264(49.9) 249(47.1) 婚姻状况 0.370 0.543 农村 265(50.1) 280(52.9) 未婚 150(28.4) 159(31.1) HBVSS得分(x±s, 分) 已婚 379(71.6) 370(69.9) 外在歧视 2.74±0.74 2.76±0.79 0.465 0.642 职业 4.080 0.130 负性自我评价 2.80±0.83 2.84±0.90 0.739 0.46 体力劳动者 238(45.0) 242(45.7) 感知的羞辱 2.89±0.77 2.90±0.83 0.249 0.803 脑力劳动者 249(47.1) 261(49.3) 保密病情 3.38±0.83 3.41±0.84 0.669 0.504 无业 42(7.9) 26(4.9) 继发歧视 2.26±0.72 2.29±0.80 0.712 0.477 表 2 HBVSS条目筛选结果
Table 2. Item selection results of HBVSS
条目 基于GRM的IRT分析 CTT分析 被选入次数(次) 是否保留条目 区分度参数a 难度/阈值参数b θ∈(-3, 3)信息量平均值 相关系数r Cronbach's α系数 标准偏差 CFA因子负荷 外在歧视 0.778 R1 1.21 -0.77~3.32 0.384 0.704 0.759 1.108 a 0.567 1 否 R2 0.89 -3.86~2.76 a 0.234 0.613 0.786 1.005 0.445 1 否 R3 1.48 a -1.92~2.89 0.607 a 0.789 a 0.705 a 0.965 0.723 a 5 是 R4 1.34 -2.35~2.76 a 0.503 0.734 0.732 0.986 0.669 1 否 R5 2.15 a -1.75~1.99 1.200a 0.808 a 0.695 a 1.006 a 0.824 a 6 是 负性自我评价 0.785 N6 1.24 -1.89~2.45 a 0.444 0.784 0.745 1.169 a 0.622 2 否 N7 1.33 -2.25~2.05 0.509 0.792 a 0.732 a 1.137 a 0.648 3 否 N8 2.14 a -1.98~1.98 1.186 a 0.802 a 0.708 a 1.008 0.801 a 5 是 N9 1.59 a -1.70~2.78 a 0.678 a 0.748 0.744 0.948 0.691 a 4 是 感知的羞辱 0.883 P10 1.92 -1.87~2.67 a 0.939 0.696 0.876 0.905 0.664 1 否 P11 2.00 -1.96~2.58 a 0.998 0.731 0.871 0.912 0.691 1 否 P12 2.43 a -1.92~2.13 a 1.447 a 0.799 a 0.861 a 0.955 0.773 a 6 是 P13 2.40 a -2.09~1.73 1.404 a 0.818 a 0.858 a 1.021 a 0.775 a 6 是 P14 2.10 a -1.87~2.13 a 1.148 a 0.780 a 0.864 a 0.994 a 0.731 a 7 是 P15 2.32 a -2.03~1.64 1.315 a 0.794 a 0.863 a 1.086 a 0.745 a 6 是 P16 1.94 -2.03~1.64 0.983 0.758 0.871 1.124 a 0.690 1 否 保密病情 0.825 D17 1.24 a -3.16~1.59 0.430 a 0.833 a 0.764 a 1.053 a 0.770 a 6 是 D18 1.13 -3.71~1.91 a 0.351 0.781 0.795 0.980 0.696 1 否 D19 1.12 -3.75~1.73 a 0.358 0.855 a 0.744 a 1.013 0.813 a 4 是 D20 1.36 a -2.42~2.37 0.522 a 0.771 0.812 1.048 a 0.670 3 否 继发歧视 0.858 S21 1.55 a -1.86~3.10 a 0.622 a 0.868 0.846 0.863 a 0.767 4 是 S22 1.46 a -1.70~3.40 a 0.546 a 0.891 a 0.785 a 0.818a 0.843 a 7 是 S23 1.32 -1.64~4.12 0.445 0.893 a 0.773 a 0.776 0.856 a 3 否 注:a表示基于该参数值,所在条目被选入次数累计1次。 表 3 HBVSS和HBVSS-12的平均信息量及信度
Table 3. Average information and reliability comparison of HBVSS and HBVSS-12
维度 θ∈(-3, 3)平均信息量 Cronbach's α系数 HBVSS HBVSS-12 差异(%) HBVSS HBVSS-12 外在歧视 2.927 1.646 1.281(43.77) 0.778 0.670 负性自我评价 2.817 2.330 0.487(17.28) 0.785 0.750 感知的羞辱 8.234 6.153 2.080(25.26) 0.883 0.856 保密病情 1.662 1.010 0.653(39.27) 0.825 0.757 继发歧视 1.613 1.289 0.324(20.10) 0.858 0.800 总量表 18.343 13.428 4.915(26.80) 0.926 0.903 表 4 HBVSS-12的IRT分析
Table 4. Results of parameter estimation using IRT in HBVSS-12
条目 a(sx) b1(sx) b2(sx) b3(sx) b4(sx) θ∈(-3, 3)信息量平均值 1 1.60(0.14) -1.81(0.19) -0.23(0.09) 1.03(0.12) 2.80(0.30) 0.693 2 1.88(0.15) -1.92(0.18) -0.30(0.08) 0.83(0.10) 2.14(0.20) 0.953 3 2.40(0.18) -1.68(0.14) -0.39(0.06) 0.48(0.07) 1.67(0.14) 1.397 4 1.91(0.16) -1.42(0.14) 0.16(0.07) 1.14(0.11) 2.52(0.25) 0.933 5 2.57(0.20) -1.62(0.14) -0.26(0.06) 0.59(0.07) 1.92(0.16) 1.565 6 2.56(0.19) -1.81(0.16) -0.57(0.07) 0.23(0.06) 1.59(0.12) 1.547 7 2.71(0.20) -1.66(0.13) -0.24(0.06) 0.67(0.07) 1.90(0.15) 1.711 8 2.34(0.18) -1.87(0.16) -0.48(0.07) 0.27(0.07) 1.53(0.13) 1.331 9 1.22(0.12) -3.24(0.34) -1.62(0.18) -0.59(0.12) 1.55(0.20) 0.413 10 1.49(0.13) -2.87(0.28) -1.44(0.15) -0.42(0.09) 1.45(0.16) 0.597 11 1.51(0.14) -1.68(0.18) 0.43(0.10) 1.74(0.17) 3.15(0.37) 0.606 12 1.62(0.14) -1.43(0.16) 0.56(0.09) 1.74(0.16) 2.82(0.33) 0.683 -
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