have been poorly studied until now. The aims of the 
present study are to assess the validity and reliability 
of  the  Indonesian  version  of  EPDS  and  to  find 
practical  recommendations  of  the  EPDS  tool 
development. 
2  MATERIALS AND METHODS 
In this section we will explain the process, materials, 
and  plans  of  our  research  from  the  very  beginning 
until we examine the data. 
2.1  Translation 
A  translation  of  the  original  EPDS  into  Indonesian 
was followed by back-translation into English. Two 
psychologists  translated  the  questionnaire  into 
Indonesian  and  two  professional  translators 
backward  translated  these  into  English.  Then  the 
provisional  version  of  the  Indonesian  questionnaire 
was developed and pilot tested. The final version of 
the  questionnaire  was  developed  after  considering 
few suggestions from pilot data.  
2.2  Sample and Data Collection 
The  Indonesian  version  of  the  EPDS  was 
administered to mothers who had a baby under age 
12 months. The samples were recruited from several 
health  care  centres  in  Jakarta,  Bogor  and  Depok 
during  they  postnatal  routine  check-up  or  their 
babies’  monthly  visit  to  the  health  care.    252 
mothers  were  included  in  this  study.  The  entire 
participant  in  this  study  agreed  to  participate  with 
signing  the  informed  consent  and  brief  explanation 
of  the  study given  to  them before  we  delivered  the 
questionnaire.  
2.3  Measure 
The  EPDS  consists  of  10  items  and  each  item  is 
rated on a four-point scale (0 to 3), giving maximum 
scores  of  30.  This  scale  covers  common  symptoms 
of  depression. It  excludes somatic  dimensions  such 
as  fatigue  and  appetite  variations  which  are  normal 
during the ante- and postnatal periods (Adouard, 
Glangeaud-Freudenthal,  &  Golse,  2005).  In  short, 
the  10  items  measured  depressive  symptoms  (“I 
have been so unhappy that I have been crying”), 
anxiety  (“I have been anxious or worried for no 
good reason”),  and  anhedonia  (“I have looked 
forward with enjoyment to things”).  The  original 
EPDS has a 12.5 cut-off point that showed that score 
13  and  up  indicates  major  postpartum  depression, 
but  along  the way  research showed  that  the  cut-off 
point  varies  from  one  research  to  another,  range 
from  9  to  12.5.    According  to  Cox,  Holden  & 
Sagovsky (1987), a score from 0 to 9 indicated ‘not 
depressed’,  while  scores  of  10  to  12  represent 
‘borderline’  and  a  score  13  or  more  is  considered 
postnatal depression.  
2.4  Procedure 
All  subjects  were  recruited  when  coming  for  a 
postnatal check-up or monthly visit for their baby’s 
vaccination at the health care services. Each woman 
was  then  asked  by  researcher  to  participate  in  this 
study.  After  hearing  the  explanation  about  the 
purpose  of  this  study,  reading  the  agreement  and 
signing  a  written  informed  consent,  women  who 
agree  to  participate  were  asked  to  complete  the 
demographic data questionnaire and the EPDS.  
2.5  Psychometric Properties  
We  examined content validity of the  EPDS’s  items 
with  Content  Validity  Index  (CVI).  According  to 
Lynn (1986), there are two types of CVIs. The first 
type  is  content  validity  of  individual  items  (I-CVI) 
and the second is content validity of overall scale (S-
CVI).  In  order  to  examine  CVI,  three  experts  were 
recruited  to  evaluate the  relevance  of  the  items  and 
the overall scale of Indonesian EPDS. We asked all 
of  the  experts  to  rate  each  item’s  relevance  to 
postpartum  depression  in  a  4-point  scale 
questionnaire.  Then,  for  each  item,  the  I-CVI  is 
computed as the number of experts giving a rating of 
either 3 or 4, divided by the total number of experts. 
To examine the S-CVI, we are looking for the 
proportion  of  items  given  a  rating  of  quite/very 
relevant  by  raters  involved.  We  also  measure  item 
validity using inter-item correlation.  Reliability  was 
estimated  by  measuring  internal  consistency  with 
Cronbach’s alpha coefficient  from  the  EPDS  score. 
We also performed a factor analysis of the EPDS to 
investigate its internal structure. 
2.6  Statistical Methods 
Item  validity  was  computed  using  Pearson 
correlation.  Internal  consistency  was  performed 
using  Cronbach’s  α  with  Statistical  Package  for 
Social  Sciences  (SPSS)  version  25.0  for  Windows. 
Confirmatory  factor  analysis  (CFA)  was  conducted 
using Lisrel 8.7.