rowid,column,type,description
1,climber_id,string,Unique climber-attempt id
2,year,int,Year of the attempt (1990-2026)
3,season,string,spring / autumn / winter / summer (~86% spring)
4,route,string,South Col-SE Ridge (Nepal) / North Ridge-NE (Tibet) / other
5,age,int,Climber age
6,sex,string,M / F
7,is_hired_staff,int,1 if hired high-altitude worker (e.g. Sherpa staff)
8,years_climbing,int,Years of climbing experience
9,prior_8000m_peaks,int,Number of 8000m peaks previously summited — the strongest predictor
10,prior_everest_attempts,int,Previous Everest attempts
11,highest_prev_altitude_m,int,Highest altitude previously reached (m)
12,operator_tier,string,budget / mid / premium / independent
13,team_size,int,Number of climbers in the team
14,sherpa_ratio,float,Hired high-altitude support per client (0-3)
15,uses_oxygen,int,1 if using supplemental oxygen
16,o2_start_altitude_m,int,Altitude where supplemental O2 begins (0 if none)
17,days_acclimatizing,int,Days spent acclimatizing before the summit push
18,camps_established,int,Number of camps established
19,summit_window_days,int,Length of the usable summit weather window (days)
20,weather_score,float,"Weather quality during the push (0-10, higher = better)"
21,jetstream_risk,float,Jet-stream disruption risk (0-10)
22,queue_minutes_above_8000,int,Minutes queuing in the death zone (a post-2012 phenomenon)
23,turnaround_reason,string,"Why they turned back (weather_window_closed, death_zone_crowding, oxygen_exhaustion, exhaustion_altitude_sickness, frostbite, team_decision, illness, other) or summited"
24,serious_incident,int,1 if a serious incident occurred (frostbite/injury class) — rare (~2%)
25,summited,int,TARGET: 1 if the climber reached the summit