Table 2 New items generated from the comments with novel ideas

  (the first aider should) contact the person’s family arriving at the scene immediately

The first aider should contact the person’s family immediately.

 make an appointment and get to know the situation in advance

The first aider should arrange a time to meet with the person in advance so they can have time to find out information about the person’s situation.

  (the first aider should) check the person’s current physical condition first, such as whether he/she is thirsty, or feeling uncomfortable

The first aider should ask the person if they have any immediate physical needs, e.g. for food or water.

  (the first aider should) provide some information about postnatal psychosis to the person’s family

The first aider should provide information about postnatal psychosis to the person’s family.

 For the item “if a mother has delusions that involve her baby, the first aider should call a mental health crisis team immediately”, a clear definition of “mental health crisis team” should be provided, and make sure that the service is available in China

If the first aider thinks a mother may be experiencing postnatal psychosis or has delusions that involve her baby, they should call emergency services immediately, as it can escalate rapidly and delays in treatment can lead to increased risk for the mother and her baby.

 For the item “the first aider should ask the person whether they have a doctor they trust, and if they do, the first aider should encourage them to seek professional help from their doctor”, there may be other professionals that the person trusts, such as a psychotherapist, a counselor etc.

The first aider should ask the person whether they have a health professional that they trust (e.g., a psychotherapist or counselor), and if they do, the first aider should encourage them to seek professional help from that professional.

 To understand the person’s medical history and interpersonal relationships, can the first aider communicate with the residents’ committee in where the person lives or others who know the person well?

If possible, the first aider should seek information about the person (e.g., medical history, interpersonal relationships) from the residents’ committees or others who know the person well.

 If possible, (the first aider should) find out if the person has a history of aggression through reliable sources immediately

If possible, the first aider should find out if the person has a history of aggression.