Couple characteristics.

Note: M = Male, F = Female, (+) = HIV positive partner, (−) = HIV negative partner.*These couples were not interviewed as they had separated at the time of conducting interviews.备注：M代表男性（Male），F代表女性（Female），(+) 代表人类免疫缺陷病毒（HIV）阳性伴侣，(−) 代表人类免疫缺陷病毒（HIV）阴性伴侣。* 上述伴侣因在访谈开展时已分手，未接受访谈。